CVE-2026-53439: Jenkins core Jenkins Exposes Other Users' Timezone Vulnerability

MODERATE
Advisory Identifier: GHSA-g28p-6mcc-v4rv
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CVSS 4.3
CWE-862
Published
Advisory Summary

CVE-2026-53439 is a MODERATE (CVSS 4.3) jenkins exposes other users' timezone vulnerability (CWE-862: Missing Authorization) affecting Jenkins core libraries in the Maven ecosystem. The issue involves jenkins exposes other users' timezone and view names to users with overall/read permission. Remediation is available by upgrading affected packages to version 2.555.3, 2.568.

CVE-2026-53439 at a Glance

CVE Identifier CVE-2026-53439
GHSA Identifier GHSA-g28p-6mcc-v4rv
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-862: Missing Authorization
Affected Product Jenkins core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-53439

To remediate this vulnerability, upgrade all affected Jenkins core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.jenkins-ci.main:jenkins-core fixed: 2.555.3 
<dependency>
    <groupId>org.jenkins-ci.main</groupId>
    <artifactId>jenkins-core</artifactId>
    <version>2.555.3</version>
</dependency>
org.jenkins-ci.main:jenkins-core fixed: 2.568 
<dependency>
    <groupId>org.jenkins-ci.main</groupId>
    <artifactId>jenkins-core</artifactId>
    <version>2.568</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.jenkins-ci.main

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-53439, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jenkins-ci.main

Analyze the terminal output to locate any version of Jenkins core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.555.3), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.main command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Jenkins core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Missing permission checks in Jenkins 2.567 and earlier, LTS 2.555.2 and earlier allow attackers with Overall/Read permission to determine other users' configured timezone and to enumerate view names of other users' "My Views".

CVE-2026-53439 Affected Jenkins core Versions

2 component(s)
Fixed Versions:
2.555.32.568
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.main:jenkins-core
maven/org.jenkins-ci.main/jenkins-core
Maven
< 2.555.3
2.555.3
org.jenkins-ci.main:jenkins-core
maven/org.jenkins-ci.main/jenkins-core
Maven
≥ 2.556
< 2.568
2.568

References

NVD — CVE-2026-53439 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53439
Jenkins core Source Repository REPOSITORY
https://github.com/jenkinsci/jenkins
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/jenkins/commit/0586de425598497cfb4dcdafa5007e507a440a77
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/jenkins/commit/98fe05f1753f664ffddd295a03492684b74e1950
Jenkins core Security Information SECURITY
https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3713

Frequently Asked Questions

What is CVE-2026-53439?
CVE-2026-53439 is a security vulnerability in Jenkins core involving Jenkins exposes other users' timezone and view names to users with Overall/Read permission under CWE-862: Missing Authorization.
Which Jenkins core versions are affected?
Affected versions include releases prior to 2.555.3, 2.568 across affected packages: org.jenkins-ci.main:jenkins-core.
What version fixes CVE-2026-53439?
Upgrading to 2.555.3, 2.568 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jenkins-core affected?
Yes, org.jenkins-ci.main:jenkins-core is affected in releases prior to 2.555.3, 2.568. Upgrade your dependency to 2.555.3, 2.568 or later.
What is the CVSS score of CVE-2026-53439?
CVE-2026-53439 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-53439?
CVE-2026-53439 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2026-53439?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jenkins-ci.main'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g28p-6mcc-v4rv",
  "modified" : "2026-08-13T20:50:46Z",
  "published" : "2026-06-10T15:31:31Z",
  "aliases" : [ "CVE-2026-53439" ],
  "summary" : "Jenkins exposes other users' timezone and view names to users with Overall/Read permission",
  "details" : "Missing permission checks in Jenkins 2.567 and earlier, LTS 2.555.2 and earlier allow attackers with Overall/Read permission to determine other users' configured timezone and to enumerate view names of other users' \"My Views\".",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.main:jenkins-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.555.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.main:jenkins-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.556"
      }, {
        "fixed" : "2.568"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-53439"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/jenkins/commit/0586de425598497cfb4dcdafa5007e507a440a77"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/jenkins/commit/98fe05f1753f664ffddd295a03492684b74e1950"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/jenkins"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3713"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-13T20:50:46Z",
    "nvd_published_at" : "2026-06-10T14:16:36Z"
  }
}