CVE-2026-26967
PJSIP has a Heap-based Buffer Overflow vulnerability in its H.264 unpacketizer
- State
- Published
- Severity
- 8.1 High
- Published
- Feb 20, 2026
- Updated
- Feb 20, 2026
- Reserved
- Feb 16, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.1 High | 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 | GitHub_M |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
pjprojectpjsip |
|
References
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