CVE-2026-34235
PJSIP: Heap OOB read in VPX unpacketizer
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.
INFO
Published Date :
March 31, 2026, 4:16 p.m.
Last Modified :
July 24, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update PJSIP to version 2.17 or later.
- Disable the VP9 codec if it is not in use.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34235.
| URL | Resource |
|---|---|
| https://github.com/pjsip/pjproject/commit/f4c7d08211da1fe2ad1504434a0ad99d12aa7536 | Patch |
| https://github.com/pjsip/pjproject/security/advisories/GHSA-pqrm-53pc-wx28 | Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34235 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34235
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34235 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34235 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: pjproject de pjsip, Description: PJSIP es una biblioteca de comunicación multimedia de código abierto y gratuita escrita en C. Antes de la versión 2.17, existe una vulnerabilidad de lectura fuera de límites en el heap en el despaquetizador RTP VP9 de PJSIP que ocurre al analizar datos manipulados de la Estructura de Escalabilidad (SS) VP9. Una comprobación de límites insuficiente en la longitud del descriptor de carga útil puede causar lecturas más allá del búfer de carga útil RTP asignado. Este problema ha sido parcheado en la versión 2.17. Una solución alternativa para este problema implica deshabilitar el códec VP9 si no es necesario. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'pjsip', 'product': 'pjproject', 'versions': [{'status': 'affected', 'version': '< 2.17'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-34235', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-02T15:20:14.682515Z'} -
Initial Analysis by [email protected]
Apr. 03, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:* versions up to (excluding) 2.17 Added Reference Type GitHub, Inc.: https://github.com/pjsip/pjproject/commit/f4c7d08211da1fe2ad1504434a0ad99d12aa7536 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/pjsip/pjproject/security/advisories/GHSA-pqrm-53pc-wx28 Types: Patch, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H -
New CVE Received by [email protected]
Mar. 31, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-125 Added Reference https://github.com/pjsip/pjproject/commit/f4c7d08211da1fe2ad1504434a0ad99d12aa7536 Added Reference https://github.com/pjsip/pjproject/security/advisories/GHSA-pqrm-53pc-wx28