by Kastro
Paper/Archive/CVE-2026-40892

CVE-2026-40892

pjsip pjproject — PJSIP: Stack buffer overflow in pjsip_auth_create_digest2()

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 36.2.362 × 207.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
pjproject<= 2.16–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)8.1CVSS: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
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/pjsip/pjproject/security/advisories/GHSA-2wcg-w3c4-48r7refgithub.com/pjsip/pjproject/commit/c82123ea6f3c3652bbc9ebd5e9e658c301451687