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NVD Vulnerability Details :

CVE-2026-27821

Awaiting Analysis

Source-security-advisories@github.com

Published At-26 Feb, 2026 | 00:16

Updated At-27 Feb, 2026 | 14:06

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.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	4.0	7.7	HIGH	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

Type: Secondary

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/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

Weaknesses

CWE ID	Type	Source
CWE-121	Secondary	security-advisories@github.com

CWE ID: CWE-121

Type: Secondary

Source: security-advisories@github.com

References

Hyperlink	Source	Resource
https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52	security-advisories@github.com	N/A
https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559	security-advisories@github.com	N/A
https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559	134c704f-9b21-4f2e-91b3-4a467353bcc0	N/A