Off-by-one in pjsip - CVE-2026-57160
Published: August 3, 2026
Vulnerability identifier: #VU140808
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57160
CWE-ID: CWE-193
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an off-by-one error in pjsip_generic_array_hdr_print() in pjsip/src/pjsip/sip_msg.c when serializing generic array headers while re-serializing incoming SIP requests. A remote attacker can send a specially crafted SIP request to cause a denial of service.
This is primarily reachable in applications such as proxies, SBCs, or B2BUAs that parse and re-serialize incoming SIP messages.
Affected software
pjsip
How to mitigate CVE-2026-57160
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.