CVE-2026-33001 is a high-severity security vulnerability in org.jenkins-ci.main:jenkins-core (maven), affecting versions <= 2.554. It is fixed in 2.555.
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.
CVE-2026-33001 has a CVSS score of 8.8 (High). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (2.555). Upgrading removes the vulnerable code path.
maven
org.jenkins-ci.main:jenkins-core (<= 2.554)org.jenkins-ci.main:jenkins-core → 2.555 (maven)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2026-33001 is reachable in your applications. Explore open-source security for your team.
See if CVE-2026-33001 is reachable in your applications. Get a demo
Upgrade org.jenkins-ci.main:jenkins-core to 2.555 or later to resolve this vulnerability.
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-33001 is a high-severity security vulnerability in org.jenkins-ci.main:jenkins-core (maven), affecting versions <= 2.554. It is fixed in 2.555.
CVE-2026-33001 has a CVSS score of 8.8 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
org.jenkins-ci.main:jenkins-core (maven) versions <= 2.554 is affected.
Yes. CVE-2026-33001 is fixed in 2.555. Upgrade to this version or later.
Whether CVE-2026-33001 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Upgrade org.jenkins-ci.main:jenkins-core to 2.555 or later.