CVE
CVE-2026-27821
GPAC NHML Demuxer (dmx_nhml.c) Vulnerable to Stack Buffer Overflow
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.
Package Versions Affected
Package Version
patch Availability
No items found.
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CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
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7.7
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4.0
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
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C
H
U
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Related Resources
No items found.
References
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27821.json, https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559, https://nvd.nist.gov/vuln/detail/CVE-2026-27821, https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52
Basic Information
Ecosystem
