PJSIP: Stack buffer overflow in pjsip_auth_create_digest2()_CVE-2026-40892

8.1 / 10

HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

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.

Basic Information

ID CVE-2026-40892

Source GitHub_M

Published Apr 21, 2026 at 19:55

Modified Apr 21, 2026 at 20:27

Affected Product

Vendor pjsip

Product pjproject

Version <= 2.16

Affected Versions pjsip pjproject <= 2.16

CWE Classification

CWE-121

References

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    "published": "2026-04-21T19:55:26.876Z",
    "modified": "2026-04-21T20:27:29.133Z",
    "type": "cve",
    "title": "PJSIP: Stack buffer overflow in pjsip_auth_create_digest2()",
    "source": "GitHub_M",
    "references": "https://github.com/pjsip/pjproject/security/advisories/GHSA-2wcg-w3c4-48r7\nhttps://github.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687",
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