CVE-2026-53435highobserved exploitationCWE-502

CVE-2026-53435: high-severity vulnerability in Jenkins

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75Vexday Risk Score

Prioritize patching. It exploitation observed by VulnCheck and has a public proof of concept.

ssvc Actcvss 8.8epss 51%
from disclosure to weapon2 days
Published on NVDJun 10
1st PoC+2d
VulnCheck+5d
In Jenkins 2.567 and earlier, LTS 2.555.2 and earlier, it is possible for attackers to have Jenkins deserialize arbitrary types defined in Jenkins core or plugins from an attacker-controlled `config.xml` submission in a way that allows them to handle HTTP requests afterwards. This can be used to impersonate any user and send HTTP requests on their behalf, up to and including use of the Script Console to run arbitrary code, or to read arbitrary files from the Jenkins controller.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Jenkins Project · Jenkins
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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