CVE WatchAug 27, 2026

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 J

CVSS

8.8

High

EPSS

53.1%

p99

KEV

—

Exploit Today

0-100

Published: Jun 10, 2026 · Last modified: Aug 27, 2026 · CWE-502

EPSS · 30d

2.2%EPSS · 30 days53.1%

2026-09-262026-10-25

Technical description

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.

Official references

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