Medium 5.1Published Feb 19, 2026

CVE-2026-26203PJSIP's pjmedia-video has use-after-free in H264 packetizer when packetizing fragmented NAL

Updated under an hour ago (Oct 27, 2026, 10:30 PM ET)

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Every CVE for pjsip pjmedia-video

Exploited in the last 30 days

PJSIP is a free and open source multimedia communication library. Versions prior to 2.17 have a critical heap buffer underflow vulnerability in PJSIP's H.264 packetizer. The bug occurs when processing malformed H.264 bitstreams without NAL unit start codes, where the packetizer performs unchecked pointer arithmetic that can read from memory located before the allocated buffer. Version 2.17 contains a patch for the issue.

CVSS: 5.1 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pjsip pjmedia-video pjsip:pjmedia_video (from the name)	before 2.17	CNA record
pjsip pjsip pjsip:pjsip	before 2.17	NVD

References

References

https://github.com/pjsip/pjproject/security/advisories/GHSA-p965-mf7j-gwv8	x-refsource-confirm, patch, vendor-advisory
https://github.com/pjsip/pjproject/commit/5aee54f09d4f91538d55279d7316591b28fded6c	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.