No exploitation reportedFix available

CVE-2026-33001

Q: Is CVE-2026-33001 actively exploited?

Active exploitation of CVE-2026-33001 has not been confirmed. Its EPSS score was 1.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-33001?

CVE-2026-33001 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2026-03-18
Fixed in2.555 · 2.541.3
WeaknessCWE-22 · CWE-59

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-03-1816:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-33001?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-33001?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Jenkins

Branch	Affected	Fixed in	Source
2.555	< 2.555	2.555	NVD
2.541	< 2.541.3	2.541.3	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Jenkins to 2.555 · 2.541.3

Advisories and patches

www.jenkins.ioVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-03-19
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.18.82026-03-18
CNACVSS 3.18.8read 2026-10-23
CISA-ADPweakness (CWE)CWE-592026-03-18
CNAweakness (CWE)CWE-22read 2026-10-23
FIRST EPSSEPSS score1.2 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published: 2026-03-18
Last Modified: 2026-09-09
NVD status: Modified

Frequently asked questions

What is CVE-2026-33001?

Is CVE-2026-33001 actively exploited?

Active exploitation of CVE-2026-33001 has not been confirmed. Its EPSS score was 1.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-33001?

CVE-2026-33001 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

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