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CVE Vulnerability Details :
CVE-2026-27821
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-26 Feb, 2026 | 00:08
Updated At-26 Feb, 2026 | 15:15
Rejected At-
▼CVE Numbering Authority (CNA)
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.

Affected Products
Vendor
GPACgpac
Product
gpac
Versions
Affected
  • <= 26.02.0
Problem Types
TypeCWE IDDescription
CWECWE-121CWE-121: Stack-based Buffer Overflow
Type: CWE
CWE ID: CWE-121
Description: CWE-121: Stack-based Buffer Overflow
Metrics
VersionBase scoreBase severityVector
4.07.7HIGH
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
Version: 4.0
Base score: 7.7
Base severity: HIGH
Vector:
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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559
x_refsource_CONFIRM
https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52
x_refsource_MISC
Hyperlink: https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559
exploit
Hyperlink: https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559
Resource:
exploit
Details not found