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.

INFO

Published Date :

2026-04-30T00:00:00.000Z

Last Modified :

2026-05-01T14:26:41.873Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2026-40685 vulnerability.

Vendors Products
Exim
  • Exim
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40685.

URL Resource
https://code.exim.org/exim/exim/commit/9fdc057e71b87c87a0d3d2288b2810a0efaaba57 cve-icon cve-icon
https://exim.org/static/doc/security/CVE-2026-40685.txt cve-icon cve-icon
https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40685.assessment cve-icon cve-icon
https://www.openwall.com/lists/oss-security/2026/04/30/21 cve-icon cve-icon
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