{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-84384", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-01T16:27:58.131Z", "datePublished": "2026-09-18T15:58:21.860Z", "dateUpdated": "2026-09-18T17:30:52.628Z"}, "containers": {"cna": {"title": "libheif: brotli/zlib decompression paths lack output-size limits, allowing decompression-bomb OOM/DoS", "problemTypes": [{"descriptions": [{"cweId": "CWE-409", "lang": "en", "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/strukturag/libheif/security/advisories/GHSA-24wx-9w62-c96w", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-24wx-9w62-c96w"}, {"name": "https://github.com/strukturag/libheif/commit/21893e8f66c8b79363ca2809391b07d35e1a95ec", "tags": ["x_refsource_MISC"], "url": "https://github.com/strukturag/libheif/commit/21893e8f66c8b79363ca2809391b07d35e1a95ec"}, {"name": "https://github.com/strukturag/libheif/releases/tag/v1.23.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.2"}], "affected": [{"vendor": "strukturag", "product": "libheif", "versions": [{"version": ">= 1.19.0, < 1.23.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T15:58:21.860Z"}, "descriptions": [{"lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.2, crafted HEIF or AVIF mime metadata and unci image data can cause decompress_brotli() and do_inflate() to grow accumulated output without an effective size limit or MemoryHandle accounting. The brotli path has no output bound, while the zlib path checks only a small temporary buffer in a branch that valid streams do not reach, and overlapping icef units can decompress the same payload repeatedly. HeifContext::interpret_heif_file_images() processes multiple compressed metadata items during file opening, allowing a small file to consume unbounded memory and terminate the process. This issue is fixed in version 1.23.2."}], "source": {"advisory": "GHSA-24wx-9w62-c96w", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/strukturag/libheif/security/advisories/GHSA-24wx-9w62-c96w", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-18T17:30:24.859004Z", "id": "CVE-2026-84384", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-18T17:30:52.628Z"}}]}}

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