PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.

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History

Fri, 20 Feb 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Pjsip pjsip
CPEs cpe:2.3:a:pjsip:pjsip:*:*:*:*:*:*:*:*
Vendors & Products Pjsip pjsip
Metrics cvssV3_1

{'score': 8.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Fri, 20 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 20 Feb 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-120
References
Metrics threat_severity

None

cvssV3_1

{'score': 8.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important


Fri, 20 Feb 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Pjsip
Pjsip pjproject
Vendors & Products Pjsip
Pjsip pjproject

Fri, 20 Feb 2026 01:00:00 +0000

Type Values Removed Values Added
Description PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.
Title PJSIP has a Heap-based Buffer Overflow vulnerability in its H.264 unpacketizer
Weaknesses CWE-122
References
Metrics cvssV4_0

{'score': 8.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-20T15:36:17.964Z

Reserved: 2026-02-16T22:20:28.612Z

Link: CVE-2026-26967

cve-icon Vulnrichment

Updated: 2026-02-20T15:30:24.869Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-20T01:15:59.953

Modified: 2026-02-20T19:30:22.237

Link: CVE-2026-26967

cve-icon Redhat

Severity : Important

Publid Date: 2026-02-20T00:26:54Z

Links: CVE-2026-26967 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-02-20T09:53:15Z

Weaknesses