{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-32740", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-13T15:02:00.628Z", "datePublished": "2026-05-19T19:22:07.743Z", "dateUpdated": "2026-05-19T19:22:07.743Z"}, "containers": {"cna": {"title": "libheif: Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing", "problemTypes": [{"descriptions": [{"cweId": "CWE-787", "lang": "en", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6j", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6j"}, {"name": "https://github.com/strukturag/libheif/releases/tag/v1.22.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/strukturag/libheif/releases/tag/v1.22.0"}], "affected": [{"vendor": "strukturag", "product": "libheif", "versions": [{"version": "< 1.22.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-19T19:22:07.743Z"}, "descriptions": [{"lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap-buffer-overflow (write) vulnerability in the grid tile compositing, allowing an attacker to write 64 bytes of fully attacker-controlled data past the end of a chroma plane heap allocation by crafting a HEIF/AVIF file with a 1\u00d74 grid of odd-height tiles. The overflow is triggered during normal image decoding with default build configuration. The written bytes are chroma (Cb/Cr) pixel values from the attacking tile, giving the attacker full control over the overflow content. This issue has been fixed in version 1.22.0."}], "source": {"advisory": "GHSA-frfr-f3vg-2g6j", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap-buffer-overflow (write) vulnerability in the grid tile compositing, allowing an attacker to write 64 bytes of fully attacker-controlled data past the end of a chroma plane heap allocation by crafting a HEIF/AVIF file with a 1\u00d74 grid of odd-height tiles. The overflow is triggered during normal image decoding with default build configuration. The written bytes are chroma (Cb/Cr) pixel values from the attacking tile, giving the attacker full control over the overflow content. This issue has been fixed in version 1.22.0."}], "id": "CVE-2026-32740", "lastModified": "2026-05-19T21:02:58.987", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-19T20:16:18.917", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/releases/tag/v1.22.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6j"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{"bugzilla": {"description": "libheif: libheif: Arbitrary code execution or denial of service via crafted HEIF/AVIF file", "id": "2479969", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479969"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in libheif, a library for decoding and encoding HEIF and AVIF image files. This heap-buffer-overflow vulnerability allows a remote attacker to write arbitrary data beyond the intended memory boundary. By crafting a malicious HEIF/AVIF file with a specific grid tile configuration, an attacker could potentially achieve arbitrary code execution or cause a denial of service."], "name": "CVE-2026-32740", "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": "2026-05-19T19:22:07Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-32740\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-32740\nhttps://github.com/strukturag/libheif/releases/tag/v1.22.0\nhttps://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6j"], "threat_severity": "Important"}

{"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": "2026-05-19T21:30:14.351953+00:00", "updated": "2026-05-20T10:15:15.974611+00:00", "vendors": ["struktur", "struktur$PRODUCT$libheif"]}