CVE-2026-27821

Summary

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 Software

Weaknesses

• CWE-121: CWE-121: Stack-based Buffer Overflow

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

Additional References

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

References

• https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559
• https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52

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