Security Advisory

CVE-2026-40685

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-04-30 00:00:00

Last updated 2026-05-01 14:26:41

Assigner mitre

CVSS score 6.5

State PUBLISHED

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.

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