# CVE-2026-57160

## Summary

- **CVE ID:** CVE-2026-57160
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N)
- **CWE:** CWE-193
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 8, 2026

## Description

PJSIP is a free and open source multimedia communication library written in C. Prior to commit d6a0e7f, a buffer overflow can occur in pjsip_generic_array_hdr_print() in pjsip/src/pjsip/sip_msg.c, the function that serializes generic array headers (such as Allow, Require, Supported, and Unsupported). Under certain output-buffer boundary conditions the function can write one byte past the end of the buffer. This is reachable mainly in applications that parse and re-serialize incoming SIP requests — for example a proxy, SBC, or B2BUA — where a remote peer can influence the serialized message. The out-of-bounds write is a single fixed byte; code execution and information disclosure are not demonstrated, and in typical pool-based allocations the byte falls within allocation slack. This issue has been patched via commit d6a0e7f.

## Affected Products

- pjsip — pjproject (< d6a0e7f76611c3a6f530ee051e3e7a622bb1748c)

## References

- [CNA](https://github.com/pjsip/pjproject/security/advisories/GHSA-277r-3q2j-mxcw)
- [CNA](https://github.com/pjsip/pjproject/commit/d6a0e7f76611c3a6f530ee051e3e7a622bb1748c)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.44%
- **EPSS Percentile:** 37.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._