CVE-2026-40892

CRITICAL

9.8

Description

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/21/2026

Last Modified4/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

pjsip:pjsip

Weaknesses (CWE)

CWE-121

References

https://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687(security-advisories@github.com)

https://github.com/pjsip/pjproject/security/advisories/GHSA-2wcg-w3c4-48r7(security-advisories@github.com)

IOC Correlations

No correlations recorded

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