Use After Free in Exim

CVE-2026-94055

Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Exim

Weakness classification (CWE)

CWE-416 — Use After Free

References

cve@mitre.org

Frequently asked questions

What is CVE-2026-94055?: CVE-2026-94055 is a low-severity vulnerability in Exim, classified under Use After Free. CVSS score: 3.7/10. Published 2026-09-19.
How severe is CVE-2026-94055?: Low severity. CVSS v3 base score is 3.7 out of 10.