Out-of-bounds Read in Pjsip Pjproject
CVE-2026-34235
PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, a heap out-of-bounds read vulnerability exists in PJSIP's VP9 RTP unpacketizer that occurs when parsing crafted VP9 Scalability Structure (SS) data. Insufficient bounds checking on the payload descriptor length may cause reads beyond the allocated RTP payload buffer. This issue has been patched in version 2.17. A workaround for this issue involves disabling VP9 codec if not needed.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (34.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Pjsip Pjproject — versions < 2.17
- Teluu Pjsip
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-34235?
- CVE-2026-34235 is a critical-severity vulnerability in Pjsip Pjproject, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2026-03-31.
- How severe is CVE-2026-34235?
- Critical severity. CVSS v3 base score is 9.1 out of 10.