# CVE-2026-90779

## Summary

- **CVE ID:** CVE-2026-90779
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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)
- **CWE:** CWE-121
- **Published:** Sep 13, 2026
- **Last Modified:** Sep 14, 2026

## 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 — sipp (0)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.56%
- **EPSS Percentile:** 45.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._