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4.3 Medium

CVE-2026-84655 Jenkins 2.579 and earlier, LTS 2.568.2 and earlier does not escape map keys when serializing objects as JSON and…

Description

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.

Affected products and versions

Product Affected versions Fixed in
Jenkins 2.580 earliest → < 2.580 2.580
Jenkins 2.568 earliest → < 2.568.3 2.568.3
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