CVE-2026-94057 PUBLISHED

Assigner: mitre
Reserved: 19.09.2026 Published: 19.09.2026 Updated: 19.09.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS Score: 4

Attack Vector	Network	Scope	Changed
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Exim
Product	Exim
Versions	Default: unaffected affected from 0 to 4.100.1 (excl.)

References

https://lists.exim.org/lurker/message/20260918.121220.0f87338e.en.html

Problem Types

CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection') CWE