VULNERABILITY INTELLIGENCE

CVE-2026-26203

CVSS score6.5 MEDIUM
EPSS probability0.12%
CISA KEVNot currently listed
Published2026-02-19
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-416

Primary references