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CVE-2026-40685
Published: Apr 30, 2026
Modified: May 1, 2026
PUBLISHED
CVSS v3.1
6.5
MEDIUM
Description
In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header, because of an incorrect implementation of \ skipping.
| Vendor | Product | Versions |
|---|---|---|
Exim | Exim | affected 0 - < 4.99.2 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
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