Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M
CVE-2026-34235PJSIP: Heap OOB read in VPX unpacketizer
Critical 9.1
In plain English
A critical-severity out-of-bounds read in pjproject from pjsip. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | pjproject | 2.17-r0 | ALPINE-CVE-2026-34235 |
| Debian:14 | asterisk | 1:22.10.0+dfsg+~cs6.17.60671434-1 | DEBIAN-CVE-2026-34235 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H