CVE-2026-33001
HighCVSS 8.8Exploitation Probability (EPSS)
Elevated risk64th percentile - higher than 64% of all known CVEs
Summary
A vulnerability in Jenkins 2.554 and earlier, and LTS 2.541.2 and earlier, allows unsafe handling of symbolic links during extraction of .tar and .tar.gz archives. This can enable writing files to arbitrary filesystem locations, restricted only by Jenkins user permissions.
Risk Assessment
Attackers with Item/Configure permission or control over agent processes can exploit this to deploy malicious scripts or plugins on the controller, potentially leading to full server compromise.
Recommendation
Immediately upgrade Jenkins to a version later than 2.554 (or LTS later than 2.541.2). Restrict Item/Configure permissions and monitor agent processes.
Other vulnerabilities in Jenkins
See all- CVE-2016-3726High
Multiple open redirect vulnerabilities in Jenkins before 2.3 and LTS before 1.651.2 allow remote attackers to redirect users to arbitrary web sites, potentially leading to phishing attacks.
- CVE-2016-0792High
Multiple unspecified API endpoints in Jenkins before 1.650 and LTS before 1.642.2 allow remote authenticated users to execute arbitrary code via serialized data in an XML file, related to XStream and groovy.util.Expando.
- CVE-2015-7538High
Jenkins before 1.640 and LTS before 1.625.2 allow remote attackers to bypass the CSRF protection mechanism via unspecified vectors.
- CVE-2015-7537High
CVE-2015-7537 is a CSRF vulnerability in Jenkins before version 1.640 and LTS before version 1.625.2 that allows remote attackers to hijack the authentication of administrators via unspecified vectors related to the HTTP GET method.
- CVE-2015-5325High
Jenkins before 1.638 and LTS before 1.625.2 allow attackers to bypass intended slave-to-master access restrictions by leveraging a JNLP slave.
- CVE-2014-2063High
Jenkins before 1.551 and LTS before 1.532.2 allows remote attackers to conduct clickjacking attacks via unspecified vectors.
- CVE-2014-3666High
Jenkins before 1.583 and LTS before 1.565.3 allows remote attackers to execute arbitrary code via a crafted packet to the CLI channel.
- CVE-2026-70426Critical
In Jenkins 2.575 and earlier, and LTS 2.568.1 and earlier, the JEP-200 class filter is not applied to classes resolved via a fallback path in Remoting deserialization. This allows agents, code on agents, and attackers with Agent/Connect permission to bypass the filter for classes on the Jenkins core classpath.
- CVE-2026-53435High
In Jenkins 2.567 and earlier, LTS 2.555.2 and earlier, an attacker can deserialize arbitrary types from Jenkins core or plugins via a crafted `config.xml` submission. This allows handling HTTP requests, impersonating any user, executing arbitrary code via the Script Console, or reading arbitrary files from the Jenkins controller.
- CVE-2017-1000362Critical
The re-key admin monitor was introduced in Jenkins 1.498, re-encrypting all secrets in JENKINS_HOME with a new key and creating a backup directory with old secrets and the key used for encryption. These backups were world-readable and not removed afterwards.
Original NVD description (English source)
Jenkins 2.554 and earlier, LTS 2.541.2 and earlier does not safely handle symbolic links during the extraction of .tar and .tar.gz archives, allowing crafted archives to write files to arbitrary locations on the filesystem, restricted only by file system access permissions of the user running Jenkins. This can be exploited to deploy malicious scripts or plugins on the controller by attackers with Item/Configure permission, or able to control agent processes.