Use After Free Affecting pjsip/pjproject package, versions [,2.17)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-PJSIPPJPROJECT-15325655
- published22 Feb 2026
- disclosed19 Feb 2026
- creditArthur Chan
Introduced: 19 Feb 2026
CVE-2026-26203 (opens in a new tab)How to fix?
Upgrade pjsip/pjproject to version 2.17 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free via the H264 packetizer when processing malformed H.264 bitstreams without NAL unit start codes. An attacker can execute arbitrary code or cause a crash by supplying specially crafted input that triggers unchecked pointer arithmetic and memory access.