Unrated severityNVD Advisory· Published Feb 26, 2026· Updated Feb 26, 2026
GPAC NHML Demuxer (dmx_nhml.c) Vulnerable to Stack Buffer Overflow
CVE-2026-27821
Description
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.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52mitrex_refsource_MISC
- github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559mitrex_refsource_CONFIRM
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