What’s Vulnerable › Vulnerabilities

CVE-2026-33001

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-18 · updated 2026-09-09
• Weakness: CWE-59

Description

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.

Affected products

• Jenkins: before 2.541.3; before 2.555 — fixed in 2.541.3, 2.555

How to fix

Upgrade to a fixed version: Jenkins 2.541.3, 2.555. Check the vendor advisory for mitigations.

References

• https://www.jenkins.io/security/advisory/2026-03-18/#SECURITY-3657
• https://access.redhat.com/errata/RHSA-2026:10199
• https://access.redhat.com/errata/RHSA-2026:10201
• https://access.redhat.com/errata/RHSA-2026:10204
• https://access.redhat.com/errata/RHSA-2026:10205
• https://access.redhat.com/errata/RHSA-2026:10206
• https://access.redhat.com/errata/RHSA-2026:10209
• https://access.redhat.com/errata/RHSA-2026:10211
• https://access.redhat.com/errata/RHSA-2026:10213
• https://access.redhat.com/errata/RHSA-2026:10214
• https://access.redhat.com/errata/RHSA-2026:10215
• https://access.redhat.com/security/cve/CVE-2026-33001

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