Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gpac | Gpac | <= 26.02.0 |
Related Weaknesses (CWE)
References
- https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52Patch
- https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559ExploitVendor Advisory
- https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559ExploitVendor Advisory
FAQ
What is CVE-2026-27821?
CVE-2026-27821 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...
How severe is CVE-2026-27821?
CVE-2026-27821 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27821?
Check the references section above for vendor advisories and patch information. Affected products include: Gpac Gpac.