CVE-2026-53435

A flaw was found in Jenkins. Attackers can exploit a deserialization vulnerability by submitting a specially crafted config.xml file. This allows them to deserialize arbitrary types, leading to the ability to impersonate users and send HTTP requests on their behalf. The most critical impact is th...

BIT-JENKINS-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...

EUVD-2026-36019

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...

CVE-2026-53435

CVE-2026-53435 affects Jenkins 2.567 and earlier, including LTS 2.555.2 and earlier. The root cause is unsafe deserialization due to a deserialization sink that bypasses a ClassFilter, allowing an attacker who can POST a config.xml to deserialize arbitrary core/plugin types and reach them via HTT...

GHSA-QV6F-RCV6-6Q3X Improper handling of REST API XML deserialization errors in Jenkins

Jenkins provides XML REST APIs to configure views, jobs, and other items. When deserialization fails because of invalid data, Jenkins 2.274 and earlier, LTS 2.263.1 and earlier stores invalid object references created through these endpoints in the Old Data Monitor. If an administrator discards t...

GHSA-WFW7-6632-XCV2 Jenkins CLI Deserialization of Untrusted Data vulnerability

The Jenkins CLI subsystem in Jenkins before 1.638 and LTS before 1.625.2 allows remote attackers to execute arbitrary code via a crafted serialized Java object, related to a problematic webapps/ROOT/WEB-INF/lib/commons-collections-.jar file and the "Groovy variant in ysoserial"...