{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-27821", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-24T02:32:39.799Z", "datePublished": "2026-02-26T00:08:39.924Z", "dateUpdated": "2026-02-26T15:15:39.671Z"}, "containers": {"cna": {"title": "GPAC NHML Demuxer (dmx_nhml.c) Vulnerable to Stack Buffer Overflow", "problemTypes": [{"descriptions": [{"cweId": "CWE-121", "lang": "en", "description": "CWE-121: Stack-based Buffer Overflow", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P", "version": "4.0"}}], "references": [{"name": "https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559"}, {"name": "https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52", "tags": ["x_refsource_MISC"], "url": "https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52"}], "affected": [{"vendor": "gpac", "product": "gpac", "versions": [{"version": "<= 26.02.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-02-26T00:08:39.924Z"}, "descriptions": [{"lang": "en", "value": "GPAC is an open-source multimedia framework. In versions up to and including 26.02.0, a stack buffer overflow occurs during NHML file parsing in `src/filters/dmx_nhml.c`. The value of the xmlHeaderEnd XML attribute is copied from att->value into szXmlHeaderEnd[1000] using strcpy() without any length validation. If the input exceeds 1000 bytes, it overwrites beyond the stack buffer boundary. Commit 9bd7137fded2db40de61a2cf3045812c8741ec52 patches the issue."}], "source": {"advisory": "GHSA-q7qh-8r2r-q559", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-02-26T15:15:32.913889Z", "id": "CVE-2026-27821", "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": "2026-02-26T15:15:39.671Z"}}]}}

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{}

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