What is CVE-2026-94057?

CVE-2026-94057 is a medium-severity vulnerability in Exim, classified under CRLF Injection. CVSS score: 4.0/10. Published 2026-09-19.

How severe is CVE-2026-94057?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Vulnerability in Exim

CVE-2026-94057

Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing.

Vulnerability class: CRLF Injection

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N.

Affected products

Exim

Weakness classification (CWE)

CWE-93 — CRLF Injection

References

cve@mitre.org

Frequently asked questions

What is CVE-2026-94057?: CVE-2026-94057 is a medium-severity vulnerability in Exim, classified under CRLF Injection. CVSS score: 4.0/10. Published 2026-09-19.
How severe is CVE-2026-94057?: Medium severity. CVSS v3 base score is 4.0 out of 10.