What’s Vulnerable › Vulnerabilities

CVE-2026-90779: SIPp through 3.7.7 Stack Buffer Overflow via createAuthHeader Algorithm Parameter

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-13 · updated 2026-09-23
• Weakness: CWE-121

Description

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.

Affected products

• sipp: through 3.7.7

References

• https://github.com/SIPp/sipp
• https://github.com/SIPp/sipp/blob/v3.7.7/src/auth.cpp#L183-L192
• https://github.com/SIPp/sipp/commit/1d4a5622bea34d0b5cdff333e6b5734608e30af7
• https://github.com/SIPp/sipp/pull/880
• https://www.vulncheck.com/advisories/sipp-through-3.7.7-stack-buffer-overflow-via-createauthheader-algorithm-parameter

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