CVE-2026-26967

MEDIUM

5.3

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.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/20/2026

Last Modified2/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

pjsip:pjsip

Weaknesses (CWE)

CWE-122

References

https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491(security-advisories@github.com)

https://github.com/pjsip/pjproject/security/advisories/GHSA-x2hc-6969-g8v6(security-advisories@github.com)

IOC Correlations

No correlations recorded

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