CVE-2026-90779

HIGH 7.5

SIPp through 3.7.7 Stack Buffer Overflow via createAuthHeader Algorithm Parameter

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121
Vendor	sipp
Product	sipp
Published	Sep 13, 2026
Last Updated	Sep 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

SIPp / sipp

0 ≤ 3.7.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 Tristan Madani