CVE-2026-32739

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{"affected": [{"affectedData": [{"product": "libheif", "vendor": "strukturag", "versions": [{"status": "affected", "version": "< 1.22.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*", "matchCriteriaId": "CB01CAAF-1D64-461B-8CC0-3CF2FBAC60A5", "versionEndExcluding": "1.22.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box_stts::get_sample_duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. This issue has been fixed in version 1.22.0."}, {"lang": "es", "value": "libheif es un decodificador y codificador de formato de archivo HEIF y AVIF. En las versiones 1.21.2 e inferiores, un archivo de secuencia HEIF de 800 bytes manipulado provoca un bucle infinito en Box_stts::get_sample_duration(), consumiendo el 100% de la CPU indefinidamente sin ning\u00fan progreso, lo que lleva a DoS. El bucle no tiene l\u00edmite de iteraciones ni tiempo de espera y se activa durante la apertura del archivo (an\u00e1lisis), antes de cualquier interacci\u00f3n del usuario o decodificaci\u00f3n de imagen. El proceso permanece activo (sin bloqueo, sin error registrado), lo que lo hace invisible para la monitorizaci\u00f3n basada en bloqueos. Este problema ha sido solucionado en la versi\u00f3n 1.22.0."}], "id": "CVE-2026-32739", "lastModified": "2026-07-24T09:10:00.153", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-32739", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-20T13:07:06.731430Z", "version": "2.0.3"}}]}, "published": "2026-05-19T20:16:18.780", "references": [{"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/strukturag/libheif/releases/tag/v1.22.0"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "libheif: libheif: Denial of Service via crafted HEIF sequence file", "id": "2479971", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479971"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-835", "details": ["A flaw was found in libheif, a HEIF and AVIF file format decoder and encoder. A remote attacker could exploit this vulnerability by providing a specially crafted HEIF (High Efficiency Image File Format) sequence file. This would trigger an infinite loop during file parsing, consuming 100% CPU indefinitely and leading to a Denial of Service (DoS) condition."], "name": "CVE-2026-32739", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "glycin-loaders", "product_name": "Red Hat Enterprise Linux 10"}], "public_date": "2026-05-19T19:10:03Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-32739\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-32739\nhttps://github.com/strukturag/libheif/releases/tag/v1.22.0\nhttps://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.22.0)"}}], "enrichment": {"confidence": 94.0, "confidence_source": "matching", "scores": [{"score": 94.0, "source": "matching"}]}, "original": {"product": "libheif", "source": "cna", "vendor": "strukturag"}, "product": "libheif", "vendor": "struktur"}], "created": "2026-05-19T21:30:14.352748+00:00", "updated": "2026-05-20T10:15:15.976447+00:00", "vendors": ["struktur", "struktur$PRODUCT$libheif"]}