CVE-2026-28799 HIGH

CVE-2026-28799: PJSIP: Heap use-after-free in PJSIP presence subscription termination handler

Vendor Pjsip
Product pjproject
Weakness CWE-416
Published March 6, 2026
Last update March 9, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, a heap use-after-free vulnerability exists in PJSIP's event subscription framework (evsub.c) that is triggered during presence unsubscription (SUBSCRIBE with Expires=0). This issue has been patched in version 2.17.

Key dates

02Disclosure timeline

March 6, 2026 CVE published
March 9, 2026 Record updated