Name: CVE-2026-84655: Improper Encoding or Escaping of Output
Creator: Rapid7
Published: 2026-09-02T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-84655, CWE-116, CVSS 4.3, EPSS 0.00192

Jenkins 2.579 and earlier, LTS 2.568.2 and earlier does not escape map keys when serializing objects as JSON and Python through its REST API, allowing attackers able to control map property names to inject arbitrary fields into JSON and Python API responses.

CVSS Details

CVSS 3.1 Base Score: 4.3
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Freebsd	—	Upgrade jenkinsUpgrade jenkins-lts	Sep 7, 2026	Sep 2, 2026
Jenkins 2026 09 02	—	Upgrade Jenkins to version 2.580Upgrade Jenkins LTS to the latest versionUpgrade Jenkins LTS to version 2.568.3Upgrade Jenkins to the latest version	Sep 3, 2026	Sep 2, 2026

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CVSS Details

Covered by Rapid7

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