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

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) PJSIP es una biblioteca de comunicación multimedia de código abierto y gratuita escrita en C. En 2.16 y versiones anteriores, existe un desbordamiento de búfer de pila en pjsip_auth_create_digest2() en PJSIP al usar credenciales de resumen precalculadas (PJSIP_CRED_DATA_DIGEST). La función copia datos de credenciales usando cred_info -> data.slen como la longitud sin una verificación de límite superior, lo que puede desbordar el búfer de pila ha1 de tamaño fijo (128 bytes) si data.slen excede la longitud esperada de la cadena de resumen.

Information

Published : 2026-04-21 21:16

Updated : 2026-10-26 21:10

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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