{"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"}}]}}