CVE-2026-40892

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a stack buffer overflow exists in pjsip_auth_create_digest2() in PJSIP when using pre-computed digest credentials (PJSIP_CRED_DATA_DIGEST). The function copies credential data using cred_info->data.slen as the length without an upper-bound check, which can overflow the fixed-size ha1 stack buffer (128 bytes) if data.slen exceeds the expected digest string length.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687	Patch
https://github.com/pjsip/pjproject/security/advisories/GHSA-2wcg-w3c4-48r7	Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pjsip:pjsip:*:*:*:*:*:*:*:*

History

23 Apr 2026, 16:07

Type	Values Removed	Values Added
References	~~() https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687 -~~	() https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687 - Patch
References	~~() https://github.com/pjsip/pjproject/security/advisories/GHSA-2wcg-w3c4-48r7 -~~	() https://github.com/pjsip/pjproject/security/advisories/GHSA-2wcg-w3c4-48r7 - Mitigation, Patch, Vendor Advisory
CPE		cpe:2.3:a:pjsip:pjsip::::::::
First Time		Pjsip Pjsip pjsip
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8

21 Apr 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-21 21:16

Updated : 2026-04-23 16:07

NVD link : CVE-2026-40892

Mitre link : CVE-2026-40892

CVE.ORG link : CVE-2026-40892

JSON object : View

Products Affected

pjsip

pjsip

CWE

CWE-121

Stack-based Buffer Overflow

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