Out-of-bounds write in pjsip - CVE-2026-57159
Published: August 3, 2026
Vulnerability identifier: #VU140807
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57159
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause memory corruption and a denial of service.
The vulnerability exists due to out-of-bounds write in assign_pt_and_update_map() in pjmedia/src/pjmedia/sdp_neg.c when processing a crafted remote SDP offer or answer. A remote attacker can send a specially crafted remote SDP offer or answer to cause memory corruption and a denial of service.
Only instances with the PJMEDIA_SDP_NEG_MAINTAIN_REMOTE_PT_MAP feature enabled are vulnerable.
Affected software
pjsip
How to mitigate CVE-2026-57159
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.