CISA ADP Vulnrichment (CVE-2026-53435)

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps org.jenkins-ci.main:jenkins-core (maven), org.jenkins-ci.main:jenkins-core (maven), org.jenkins-ci.main:jenkins-core (maven), org.jenkins-ci.main:jenkins-core (maven). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
org.jenkins-ci.main:jenkins-coremaven	>=0 <2.555.3	2.555.3
org.jenkins-ci.main:jenkins-coremaven	>=2.556 <2.568	2.568
org.jenkins-ci.main:jenkins-coremaven	<2.555.3	2.555.3
org.jenkins-ci.main:jenkins-coremaven	>=2.556,<2.568	2.568

Recommended response

Check inventory. Check lockfiles and deployed manifests for org.jenkins-ci.main:jenkins-core, org.jenkins-ci.main:jenkins-core, org.jenkins-ci.main:jenkins-core.
Review the reported fix. Update org.jenkins-ci.main:jenkins-core to 2.555.3; org.jenkins-ci.main:jenkins-core to 2.568; org.jenkins-ci.main:jenkins-core to 2.555.3; org.jenkins-ci.main:jenkins-core to 2.568 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jun 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 10, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.