Buffer overflow in Sipp

CVE-2026-90779

SIPp through 3.7.7 contains a stack buffer overflow vulnerability in createAuthHeader() when processing SIP authentication challenges with oversized algorithm parameters. A malicious SIP server can send a crafted 401 or 407 challenge to corrupt the stack and crash the client process.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-90779?
CVE-2026-90779 is a high-severity vulnerability in Sipp, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-09-13.
How severe is CVE-2026-90779?
High severity. CVSS v3 base score is 7.5 out of 10.