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CVE-2026-32945

PJSIP is vulnerable to Heap-based Buffer Overflow through DNS parser

Published: Mar 20, 2026Updated: Mar 23, 2026 Sources: CVE List NVDCWE-122
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
0.3%
Top 77.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

PJSIP is a free and open source multimedia communication library written in C. Versions 2.16 and below have a Heap-based Buffer Overflowvulnerability in the DNS parser's name length handler. Thisimpacts applications using PJSIP's built-in DNS resolver, such as those configured with pjsua_config.nameserver or UaConfig.nameserver in PJSUA/PJSUA2. It does not affect users who rely on the OS resolver (e.g., getaddrinfo()) by not configuring a nameserver, or those using an external resolver via pjsip_resolver_set_ext_resolver(). This issue is fixed in version 2.17. For users unable to upgrade, a workaround is to disable DNS resolution in the PJSIP config (by setting nameserver_count to zero) or to use an external resolver implementation instead.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-122

Affected Products

pjprojectpjsip
Mixed
Communications / voip-telephony
pjsippjsip
Mixed
Communications / voip-telephony
pjsiposs-projectCommunicationsaka pjproject, pjmedia-video, pjsip

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/pjsip/pjproject/security/advisories/GHSA-jr2p-p2w4-rr9q
github.com
https://github.com/pjsip/pjproject/commit/5311aee398ae9d623829a6bad7b679a193c9e199
github.com

Timeline

Published
Mar 20, 2026
Last Updated
Mar 23, 2026

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