CVE-2026-53435

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.

Affected

Jenkins Project · Jenkins

CVSS v3.1 CNA

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

2.16% chance of exploitation in the next 30 days, 82nd percentile

Published

2026-06-10

Updated

2026-09-09

Proof-of-concept exploits (1)

• AmesianX/CVE-2026-5343511★ · 2026-06-12

Security advisories

• https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3707
• advisories/GHSA-g2xq-2v27-4rh3

References

• CVE Record
• NVD entry

Related

• CVE-2021-21220