CVE-2026-28799

8.7 highEPSS 0.3%

High (8.7) in pjsip pjsip. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.7 high

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

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
CWE: CWE-416
Published: 2026-03-06
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

pjsip:pjsip

References

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

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