{ "schemaVersion": "1.0", "publisher": "脆弱性ナビ", "origin": "https://zeijaku.ittrip.xyz", "terms": [ { "name": "CVE Program", "url": "https://www.cve.org/legal/termsofuse", "notice": "CVE content is used subject to the CVE Program Terms of Use. CVE is a trademark of The MITRE Corporation.", "licenseText": "CVE content: Copyright The MITRE Corporation. CVE is a trademark of The MITRE Corporation.\nCVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.\nDisclaimers: ALL DOCUMENTS AND THE INFORMATION CONTAINED THEREIN PROVIDED BY MITRE ARE PROVIDED ON AN \"AS IS\" BASIS AND THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE MITRE CORPORATION, ITS BOARD OF TRUSTEES, OFFICERS, AGENTS, AND EMPLOYEES, DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION THEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE." }, { "name": "NIST NVD", "url": "https://nvd.nist.gov/general/faq", "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD." }, { "name": "JVN", "url": "https://jvn.jp/contact/index.html", "notice": "出典：JVN（JPCERT/CC・IPA）。原文は各レコードの参照先を確認してください。" }, { "name": "CISA KEV", "url": "https://github.com/cisagov/kev-data", "notice": "Known Exploited Vulnerabilities catalog, CISA. CC0." } ], "record": { "id": "CVE-2026-47247", "aliases": [], "title": "libheif：情報の漏えい", "summary": "libheifはHEIFおよびAVIF形式のデコーダ・エンコーダです。バージョン1.22.0以前には2つのバグがあり、デコードされたグリッド画像のピクセル値としてプロセスのヒープメモリが漏洩します。攻撃者が細工したAVIF/HEICファイルをサーバ側画像処理系（WordPress、Sharp/libvips、ImageMagick など）にアップロードすると、公開ダウンロード可能な JPEG/PNG/WebP 出力にヒープデータが含まれ、取得できるようになります。ローカル環境でも同様の攻撃が可能です。バージョン1.22.0で修正されています。", "risk": "ヒープ上のデータが漏洩し、ASLR を回避できる関数ポインタやその他の機密情報が取得される可能性があります。", "product": "libheif", "category": "wordpress", "component": "unknown", "severity": "high", "cvss": 7.5, "cvssVersion": "3.1", "cvssSource": "GitHub_M", "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "affected": [ { "product": "libheif", "range": "< 1.22.0" } ], "fixed": [], "steps": [ "libheif をバージョン 1.22.0 以降にアップデートする。", "「CVE-2026-47247」と現在の版を管理担当者・提供元へ伝え、この問題に対応した修正版が提供されているか確認します。下の問い合わせ文に記入すれば、そのまま依頼できます。対象範囲の上限から修正版の番号を推測しないでください。", "ファイルとデータベースのバックアップを取り、管理画面の「ダッシュボード」→「更新」で該当する本体・プラグイン・テーマの更新を実行します。更新が表示されない有料製品などは、購入先・開発元の正規の配布経路を利用してください。" ], "references": [ { "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "label": "CVE：GitHub_M" }, { "url": "https://www.cve.org/CVERecord?id=CVE-2026-47247", "label": "CVE公式レコード" }, { "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-2vh6-whr3-cmq3", "label": "134c704f-9b21-4f2e-91b3-4a467353bcc0" }, { "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47247", "label": "NVDの原文" }, { "url": "https://www.first.org/cvss/v3.1/specification-document", "label": "FIRST公式：CVSS 3.1の条件の定義" }, { "url": "https://wordpress.org/documentation/article/plugins-screen/", "label": "WordPress公式：プラグイン一覧" }, { "url": "https://wordpress.org/documentation/article/appearance-themes-screen/", "label": "WordPress公式：テーマの確認" }, { "url": "https://wordpress.org/documentation/article/site-health-screen/", "label": "WordPress公式：サイトヘルスの情報" }, { "url": "https://wordpress.org/documentation/article/updating-wordpress/", "label": "WordPress公式：本体の更新" }, { "url": "https://wordpress.org/documentation/article/dashboard-updates-screen/", "label": "WordPress公式：更新画面" }, { "url": "https://wordpress.org/documentation/article/manage-plugins/", "label": "WordPress公式：プラグインの確認と更新" } ], "publishedAt": "2026-07-21T21:16:59.853Z", "modifiedAt": "2026-10-24T19:10:00.127Z", "fetchedAt": "2026-10-25T01:20:52.681Z", "exploitStatus": "unknown", "sources": [ "CVE", "NVD" ], "originalText": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain to leak process heap memory as visible pixel values in decoded grid images. An attacker who uploads a crafted AVIF/HEIC file to any server-side image processor (WordPress, Sharp/libvips, ImageMagick, etc.) can recover heap data - including library function pointers sufficient to defeat ASLR, or any other secret - from the publicly-downloadable transcoded JPEG/PNG/WebP output. Local attack vectors are also possible. Version 1.22.0 fixes the issue.", "sourceTitle": "libheif Vulnerable to Heap Information Disclosure via Grid Image Gap + Uninitialized Pixel Plane Allocation", "summaryMethod": "公式の公開情報を根拠に自動作成した日本語解説です。引用との整合性を自動検査しています。人による個別確認や利用環境の診断ではありません。", "state": "published", "affectedDetails": [ { "vendor": "strukturag", "product": "libheif", "versions": [ { "version": "< 1.22.0", "status": "affected" } ] } ], "officialEvidence": { "schemaVersion": "1.0", "id": "CVE-2026-47247", "sourceType": "CVE", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "fetchedAt": "2026-10-25T01:20:52.681Z", "publishedAt": "2026-07-21T21:16:59.853Z", "modifiedAt": "2026-07-22T14:29:24.487Z", "state": "published", "provider": "GitHub_M", "title": "libheif Vulnerable to Heap Information Disclosure via Grid Image Gap + Uninitialized Pixel Plane Allocation", "descriptions": [ { "lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain to leak process heap memory as visible pixel values in decoded grid images. An attacker who uploads a crafted AVIF/HEIC file to any server-side image processor (WordPress, Sharp/libvips, ImageMagick, etc.) can recover heap data - including library function pointers sufficient to defeat ASLR, or any other secret - from the publicly-downloadable transcoded JPEG/PNG/WebP output. Local attack vectors are also possible. Version 1.22.0 fixes the issue.", "sourcePath": "/containers/cna/descriptions/0/value" } ], "affected": [ { "vendor": "strukturag", "product": "libheif", "sourcePath": "/containers/cna/affected/0", "platforms": [], "modules": [], "programFiles": [], "cpes": [], "programRoutines": [], "versions": [ { "sourcePath": "/containers/cna/affected/0/versions/0", "version": "< 1.22.0", "status": "affected" } ] } ], "solutions": [], "workarounds": [], "exploits": [], "rejectedReasons": [], "problemTypes": [ { "cweId": "CWE-200", "lang": "en", "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor", "sourcePath": "/containers/cna/problemTypes/0/descriptions/0" }, { "cweId": "CWE-226", "lang": "en", "description": "CWE-226: Sensitive Information in Resource Not Removed Before Reuse", "sourcePath": "/containers/cna/problemTypes/1/descriptions/0" }, { "cweId": "CWE-682", "lang": "en", "description": "CWE-682: Incorrect Calculation", "sourcePath": "/containers/cna/problemTypes/2/descriptions/0" }, { "cweId": "CWE-908", "lang": "en", "description": "CWE-908: Use of Uninitialized Resource", "sourcePath": "/containers/cna/problemTypes/3/descriptions/0" } ], "metrics": [ { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "provider": "GitHub_M", "sourcePath": "/containers/cna/metrics/0/cvssV3_1" } ], "references": [ { "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-2vh6-whr3-cmq3", "label": "CISA-ADP", "tags": [ "exploit" ], "provider": "CISA-ADP", "sourcePath": "/containers/adp/0/references/0" } ], "snippets": [ { "evidenceId": "official:/containers/cna/affected/0", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourcePath": "/containers/cna/affected/0", "text": "{\"vendor\":\"strukturag\",\"product\":\"libheif\",\"versions\":[{\"version\":\"< 1.22.0\",\"status\":\"affected\"}]}", "truncated": false, "representation": "source_json" }, { "evidenceId": "official:/containers/cna/descriptions/0/value", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourcePath": "/containers/cna/descriptions/0/value", "text": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain to leak process heap memory as visible pixel values in decoded grid images. An attacker who uploads a crafted AVIF/HEIC file to any server-side image processor (WordPress, Sharp/libvips, ImageMagick, etc.) can recover heap data - including library function pointers sufficient to defeat ASLR, or any other secret - from the publicly-downloadable transcoded JPEG/PNG/WebP output. Local attack vectors are also possible. Version 1.22.0 fixes the issue.", "truncated": false, "representation": "source_excerpt" }, { "evidenceId": "official:/containers/cna/problemTypes/0/descriptions/0", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourcePath": "/containers/cna/problemTypes/0/descriptions/0", "text": "{\"cweId\":\"CWE-200\",\"lang\":\"en\",\"description\":\"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor\",\"type\":\"CWE\"}", "truncated": false, "representation": "source_json" }, { "evidenceId": "official:/containers/cna/problemTypes/1/descriptions/0", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourcePath": "/containers/cna/problemTypes/1/descriptions/0", "text": "{\"cweId\":\"CWE-226\",\"lang\":\"en\",\"description\":\"CWE-226: Sensitive Information in Resource Not Removed Before Reuse\",\"type\":\"CWE\"}", "truncated": false, "representation": "source_json" }, { "evidenceId": "official:/containers/cna/problemTypes/2/descriptions/0", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourcePath": "/containers/cna/problemTypes/2/descriptions/0", "text": "{\"cweId\":\"CWE-682\",\"lang\":\"en\",\"description\":\"CWE-682: Incorrect Calculation\",\"type\":\"CWE\"}", "truncated": false, "representation": "source_json" }, { "evidenceId": "official:/containers/cna/problemTypes/3/descriptions/0", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourcePath": "/containers/cna/problemTypes/3/descriptions/0", "text": "{\"cweId\":\"CWE-908\",\"lang\":\"en\",\"description\":\"CWE-908: Use of Uninitialized Resource\",\"type\":\"CWE\"}", "truncated": false, "representation": "source_json" }, { "evidenceId": "official:/containers/cna/metrics/0/cvssV3_1", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourcePath": "/containers/cna/metrics/0/cvssV3_1", "text": "{\"attackComplexity\":\"LOW\",\"attackVector\":\"NETWORK\",\"availabilityImpact\":\"NONE\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"privilegesRequired\":\"NONE\",\"scope\":\"UNCHANGED\",\"userInteraction\":\"NONE\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\",\"version\":\"3.1\"}", "truncated": false, "representation": "source_json" } ], "limits": { "completeness": "official_record", "truncatedFields": [], "note": "CVE公式レコードに記載された情報です。参照先の個別ページ本文は含みません。unaffected（影響なし）の版を修正版とは推測しません。" } }, "sourceSnapshots": [ { "source": "CVE", "modifiedAt": "2026-07-22T14:29:24.487Z", "fetchedAt": "2026-10-25T01:20:52.681Z", "state": "published" }, { "source": "NVD", "modifiedAt": "2026-10-24T19:10:00.127Z", "fetchedAt": "2026-10-25T01:17:49.478Z", "state": "published" } ], "configurationDetails": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.22.0", "matchCriteriaId": "CB01CAAF-1D64-461B-8CC0-3CF2FBAC60A5" } ] } ] } ], "sourceSummary": "libheifに情報の漏えいに関する脆弱性情報があります。影響を受ける条件を確認してください。", "sourceRisk": "本来公開しない情報を読み取られる可能性があります。", "guidance": { "schemaVersion": "1.0", "method": "automatic", "reviewedAt": null, "reviewState": "current", "generatedAt": "2026-10-25T01:20:52.681Z", "generatorVersion": "2026-10-23.3", "sourceFingerprint": "72a7c24731d036248b90cafdfeb114748fcfea8bd9bb6b240df7d59971bc04d6", "sourceModifiedAt": "2026-10-24T19:10:00.127Z", "model": "@cf/openai/gpt-oss-120b", "verificationMethod": "exact_source_excerpt_and_independent_semantic_check", "summary": "libheifはHEIFおよびAVIF形式のデコーダ・エンコーダです。バージョン1.22.0以前には2つのバグがあり、デコードされたグリッド画像のピクセル値としてプロセスのヒープメモリが漏洩します。攻撃者が細工したAVIF/HEICファイルをサーバ側画像処理系（WordPress、Sharp/libvips、ImageMagick など）にアップロードすると、公開ダウンロード可能な JPEG/PNG/WebP 出力にヒープデータが含まれ、取得できるようになります。ローカル環境でも同様の攻撃が可能です。バージョン1.22.0で修正されています。", "risk": "ヒープ上のデータが漏洩し、ASLR を回避できる関数ポインタやその他の機密情報が取得される可能性があります。", "summaryEvidenceIds": [ "E1", "E2" ], "riskEvidenceIds": [ "E1" ], "applicability": [ { "text": "libheif のバージョンが 1.22.0 未満であること。", "kind": "fact", "sourceUrls": [ "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json" ], "evidenceIds": [ "E3", "E2" ] }, { "text": "サーバ側画像処理系（例: WordPress、Sharp/libvips、ImageMagick など）が libheif を使用していること。", "kind": "fact", "sourceUrls": [ "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json" ], "evidenceIds": [ "E1", "E2" ] }, { "text": "攻撃者が AVIF または HEIC 形式のファイルをサーバにアップロードできること。", "kind": "fact", "sourceUrls": [ "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json" ], "evidenceIds": [ "E1", "E2" ] }, { "text": "変換後の JPEG、PNG、WebP 画像が公開ダウンロード可能であること。", "kind": "fact", "sourceUrls": [ "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json" ], "evidenceIds": [ "E1", "E2" ] }, { "text": "ローカル環境で libheif を使用している場合にも同様の攻撃が可能であること。", "kind": "fact", "sourceUrls": [ "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json" ], "evidenceIds": [ "E1", "E2" ] }, { "text": "公式の対象表：strukturag / libheif。影響ありとして記載：< 1.22.0。", "kind": "fact", "sourceUrls": [ "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json" ], "evidenceIds": [ "E3" ] } ], "versionChecks": [ { "text": "管理担当者に、利用中の製品名・開発元・版やビルド番号を確認してもらいます。上に記載した対象の機能・設定・利用者の権限も、実際の環境と照合してください。", "kind": "procedure", "sourceUrls": [ "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json" ], "evidenceIds": [ "E3" ] }, { "text": "「libheif」が本体・プラグイン・テーマのどれかを確認します。管理画面の「プラグイン」と「外観」→「テーマ」で製品名・開発元を照合し、本体の番号は「ツール」→「サイトヘルス」→「情報」で確認してください。", "kind": "procedure", "sourceUrls": [ "https://wordpress.org/documentation/article/plugins-screen/", "https://wordpress.org/documentation/article/appearance-themes-screen/", "https://wordpress.org/documentation/article/site-health-screen/" ] }, { "text": "管理画面に入れない、または同じ名前の製品を判別できない場合は、下の問い合わせ文をサイトの制作会社・管理担当者に送ってください。名前が見つからないという理由だけで、安全とは判定しないでください。", "kind": "procedure", "sourceUrls": [ "https://wordpress.org/documentation/article/site-health-screen/", "https://wordpress.org/documentation/article/plugins-screen/" ] } ], "actions": [ { "text": "libheif をバージョン 1.22.0 以降にアップデートする。", "kind": "fix", "sourceUrls": [ "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json" ], "evidenceIds": [ "E1" ] }, { "text": "「CVE-2026-47247」と現在の版を管理担当者・提供元へ伝え、この問題に対応した修正版が提供されているか確認します。下の問い合わせ文に記入すれば、そのまま依頼できます。対象範囲の上限から修正版の番号を推測しないでください。", "kind": "procedure", "sourceUrls": [ "https://www.cve.org/CVERecord?id=CVE-2026-47247", "https://github.com/strukturag/libheif/security/advisories/GHSA-2vh6-whr3-cmq3", "https://nvd.nist.gov/vuln/detail/CVE-2026-47247" ] }, { "text": "ファイルとデータベースのバックアップを取り、管理画面の「ダッシュボード」→「更新」で該当する本体・プラグイン・テーマの更新を実行します。更新が表示されない有料製品などは、購入先・開発元の正規の配布経路を利用してください。", "kind": "procedure", "sourceUrls": [ "https://wordpress.org/documentation/article/updating-wordpress/", "https://wordpress.org/documentation/article/dashboard-updates-screen/", "https://wordpress.org/documentation/article/manage-plugins/" ] } ], "temporaryMitigations": [ { "text": "更新できない場合は、対象機能の停止や公開範囲の制限が使えるかを管理担当者と検討し、実施内容と更新予定日を記録してください。プラグインの「無効化」だけでこの脆弱性を防げるかは個別に確認が必要です。", "kind": "procedure", "sourceUrls": [ "https://wordpress.org/documentation/article/plugins-screen/", "https://www.cve.org/CVERecord?id=CVE-2026-47247", "https://github.com/strukturag/libheif/security/advisories/GHSA-2vh6-whr3-cmq3", "https://nvd.nist.gov/vuln/detail/CVE-2026-47247" ] } ], "verification": [ { "text": "対応を依頼した場合は、実施した版・設定と完了日時、この脆弱性への修正が含まれると判断した根拠を担当者から受け取ってください。更新後は普段使う主要な操作も確認します。", "kind": "procedure", "sourceUrls": [ "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json" ], "evidenceIds": [ "E3" ] }, { "text": "更新後に同じ管理画面を開き直してバージョンを記録します。修正対象の系列・版と一致するかを照合し、サイト表示、ログイン、フォームや購入など普段使う主要な操作も確認してください。更新ボタンを押しただけでは完了としないでください。", "kind": "procedure", "sourceUrls": [ "https://wordpress.org/documentation/article/updating-wordpress/", "https://wordpress.org/documentation/article/dashboard-updates-screen/" ] } ], "unknowns": [ "この解説は、利用中の機器・サイトの設定や修正の適用状況を検査した結果ではありません。製品名・版と上に示した条件を、実際の環境と照合してください。", "今回取得した資料から、修正済みと明記された版の番号を取り出せていません。修正が存在しないという意味ではありません。対象の製品・現在の版を添え、提供元に修正版の番号と適用方法を確認してください。" ], "sources": [ { "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "label": "CVE：GitHub_M" }, { "url": "https://www.cve.org/CVERecord?id=CVE-2026-47247", "label": "CVE公式レコード" }, { "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-2vh6-whr3-cmq3", "label": "134c704f-9b21-4f2e-91b3-4a467353bcc0" }, { "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47247", "label": "NVDの原文" }, { "url": "https://www.first.org/cvss/v3.1/specification-document", "label": "FIRST公式：CVSS 3.1の条件の定義" }, { "url": "https://wordpress.org/documentation/article/plugins-screen/", "label": "WordPress公式：プラグイン一覧" }, { "url": "https://wordpress.org/documentation/article/appearance-themes-screen/", "label": "WordPress公式：テーマの確認" }, { "url": "https://wordpress.org/documentation/article/site-health-screen/", "label": "WordPress公式：サイトヘルスの情報" }, { "url": "https://wordpress.org/documentation/article/updating-wordpress/", "label": "WordPress公式：本体の更新" }, { "url": "https://wordpress.org/documentation/article/dashboard-updates-screen/", "label": "WordPress公式：更新画面" }, { "url": "https://wordpress.org/documentation/article/manage-plugins/", "label": "WordPress公式：プラグインの確認と更新" } ], "evidence": [ { "id": "E1", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourceField": "/containers/cna/descriptions/0/value", "excerpt": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain to leak process heap memory as visible pixel values in decoded grid images. An attacker who uploads a crafted AVIF/HEIC file to any server-side image processor (WordPress, Sharp/libvips, ImageMagick, etc.) can recover heap data - including library function pointers sufficient to defeat ASLR, or any other secret - from the publicly-downloadable transcoded JPEG/PNG/WebP output. Local attack vectors are also possible. Version 1.22.0 fixes the issue.", "language": "en", "representation": "source_excerpt" }, { "id": "E2", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourceField": "/containers/cna/title", "excerpt": "libheif Vulnerable to Heap Information Disclosure via Grid Image Gap + Uninitialized Pixel Plane Allocation", "language": null }, { "id": "E3", "sourceUrl": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47247.json", "sourceField": "/containers/cna/affected/0", "excerpt": "{\"vendor\":\"strukturag\",\"product\":\"libheif\",\"versions\":[{\"version\":\"< 1.22.0\",\"status\":\"affected\"}]}", "language": null, "representation": "source_json" } ], "supportRequest": "件名：CVE-2026-47247（libheif）の影響と対応確認\n\n利用中の製品・サービス：[記入してください]\n現在のバージョン・設定：[不明なら「不明」と記入]\n\n次の公式情報にある条件が、私たちの環境に当てはまるか確認をお願いします。\n・libheif のバージョンが 1.22.0 未満であること。\n・サーバ側画像処理系（例: WordPress、Sharp/libvips、ImageMagick など）が libheif を使用していること。\n・攻撃者が AVIF または HEIC 形式のファイルをサーバにアップロードできること。\n・変換後の JPEG、PNG、WebP 画像が公開ダウンロード可能であること。\n・ローカル環境で libheif を使用している場合にも同様の攻撃が可能であること。\n・公式の対象表：strukturag / libheif。影響ありとして記載：< 1.22.0。\n\n対象の場合、適用する修正・回避策、実施予定、停止や再起動の必要性、完了後の確認結果を教えてください。\n確認している情報：https://zeijaku.ittrip.xyz/vulnerabilities/CVE-2026-47247", "publicationCheckVersion": "2026-10-23.1", "sourceNotices": [], "automation": { "status": "ready", "lastAttempt": "2026-10-25T01:20:52.681Z", "lastSuccess": "2026-10-25T01:20:52.681Z", "sourceCheckedAt": "2026-10-25T01:20:52.681Z", "errorCode": null }, "glossary": [] } } }