9.8

CVE-2026-40685

Medienbericht
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Exim ≫ Exim Version < 4.99.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.32% 0.236
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
cve@mitre.org 6.5 2.2 4.2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
CWE-684 Incorrect Provision of Specified Functionality

The code does not function according to its published specifications, potentially leading to incorrect usage.

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

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VulnDex Intel
Media Report
04.05.2026 17:53
https://www.openwall.com/lists/oss-security/2026/04/30/21
Third Party Advisory
Mailing List
https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40685.assessment
Vendor Advisory
https://code.exim.org/exim/exim/commit/9fdc057e71b87c87a0d3d2288b2810a0efaaba57
Patch
https://exim.org/static/doc/security/CVE-2026-40685.txt
Broken Link