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.

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - security-advisories@github.com

Published

2026-04-21

Last modified

2026-10-26

Weaknesses

CWE-121

Affected products

• Pjproject (Pjsip)
• Pjsip (Pjsip)

References

• https://github.com/pjsip/pjproject/security/advisories/GHSA-2wcg-w3c4-48r7
• https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687