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Vulnerability Details :

CVE-2026-27821

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-26 Feb, 2026 | 00:08
Updated At-26 Feb, 2026 | 15:15
Rejected At-
Credits

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:26 Feb, 2026 | 00:08
Updated At:26 Feb, 2026 | 15:15
Rejected At:
â–¼CVE 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
â–¼Authorized 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
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.07.7HIGH
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/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
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-121Secondarysecurity-advisories@github.com
CWE ID: CWE-121
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52security-advisories@github.com
N/A
https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559security-advisories@github.com
N/A
https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559134c704f-9b21-4f2e-91b3-4a467353bcc0
N/A
Hyperlink: https://github.com/gpac/gpac/commit/9bd7137fded2db40de61a2cf3045812c8741ec52
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource: N/A

Change History

0
Information is not available yet

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