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CVE-2026-27821

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d5e9912886bc46b61749808948115e54a4e033e69939113bc985257cef0342b6
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"gpac","vendor":"gpac","versions":[{"status":"affected","version":"<= 26.02.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1ffda9c926d9bab58742326e9f6598ffcb6fa54667f1b4694290659e4acd844b · sha256:099e9b75a16bd57c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","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","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1ffda9c926d9bab58742326e9f6598ffcb6fa54667f1b4694290659e4acd844b · sha256:099e9b75a16bd57c… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-121","description":"CWE-121: Stack-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1ffda9c926d9bab58742326e9f6598ffcb6fa54667f1b4694290659e4acd844b · sha256:099e9b75a16bd57c… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52","tags":["x_refsource_MISC"],"url":"https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1ffda9c926d9bab58742326e9f6598ffcb6fa54667f1b4694290659e4acd844b · sha256:099e9b75a16bd57c… · /containers/cna/references/1
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1ffda9c926d9bab58742326e9f6598ffcb6fa54667f1b4694290659e4acd844b · sha256:099e9b75a16bd57c… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1ffda9c926d9bab58742326e9f6598ffcb6fa54667f1b4694290659e4acd844b · sha256:099e9b75a16bd57c… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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