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.

Scoring

Severity

HIGH

CVSS base score

8.7

CVSS vector

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

EPSS probability

0.56%

CWE

CWE-121

Published

2026-09-13

Last modified

2026-09-14

Affected products

• SIPp sipp

Weakness type

• CWE-121

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