CVE-2026-33001Network attack vector

Controller code execution via symlink-following archive extraction

Published Mar 18, 2026 · Updated Mar 18, 2026

Link-following in Jenkins 2.554 and earlier and LTS 2.541.2 and earlier allows remote authenticated users to write arbitrary files. The standard artifact manager extracts crafted .tar and .tar.gz archives without rejecting symbolic links whose real paths escape the target directory. Item/Configure permission or control of an agent process is required; writes inherit Jenkins filesystem permissions and can deploy controller startup scripts or plugins for code execution.

CVSS severity8.8
High
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Link-following in Jenkins 2.554 and earlier and LTS 2.541.2 and earlier allows remote authenticated users to write arbitrary files. The standard artifact manager extracts crafted .tar and .tar.gz archives without rejecting symbolic links whose real paths escape the target directory. Item/Configure permission or control of an agent process is required; writes inherit Jenkins filesystem permissions and can deploy controller startup scripts or plugins for code execution.

The record

CVE
CVE-2026-33001
Published
Mar 18, 2026
Updated
Mar 18, 2026
Vendor
Jenkins Project
Product
Jenkins
Classifications
CWE-61, CWE-59, CWE-22, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · JenkinsAffected versions are unavailable in this record.

Published CVSS scores

8.8redhat-SADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-61UNIX Symbolic Link (Symlink) Following
CWE-59Improper Link Resolution Before File Access ('Link Following')
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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