CVE-2026-27821 | THREATINT

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.

PUBLISHED Reserved 2026-02-24 | Published 2026-02-26 | Updated 2026-02-26 | Assigner GitHub_M

HIGH: 7.7CVSS: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

Problem types

CWE-121: Stack-based Buffer Overflow

Product status

<= 26.02.0

affected

References

github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559 exploit

github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559

github.com/...ommit/9bd7137fded2db40de61a2cf3045812c8741ec52

cve.org (CVE-2026-27821)

nvd.nist.gov (CVE-2026-27821)

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