CVE-2026-94056

high

Assigned by CNA: mitre

Published 2026-09-19 · Modified 2026-09-19

Discuss on Community Propose mitigation

CVSS v3

7.5

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

7.5

Description

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data from stack memory.

Predictions

Exploit likelihood

83%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

References

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

CWEs

CWE-908

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.