CVE-2026-28799

HIGH EPSS 20.2%
Published Mar 6, 20263mo ago · Modified Mar 10, 20263mo ago
8.7 CVSS 4.0
High
Find Similar
Published Mar 6, 2026 3mo ago
Last Modified Mar 10, 2026 3mo ago

Description

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
20.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 1

VendorProductVersionRange
pjsippjsip* <2.17

References 2

  • github.com https://github.com/pjsip/pjproject/commit/e06ff6c64741cc1675fd3296615910f532f6b1a1
    Patch
  • github.com https://github.com/pjsip/pjproject/security/advisories/GHSA-8fj4-fv9f-hjpc
    PatchVendor Advisory

Remediation

  • github.com https://github.com/pjsip/pjproject/commit/e06ff6c64741cc1675fd3296615910f532f6b1a1
    Patch
  • github.com https://github.com/pjsip/pjproject/security/advisories/GHSA-8fj4-fv9f-hjpc
    PatchVendor Advisory