A missing permission check in Jenkins Pipeline: Build Step Plugin 599.v4b_67ea_11b_152 and earlier causes downstream builds awaited by the…

published 2026-09-02 2 mo ago modified 2026-09-03 2 mo ago also EUVD-2026-70127

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits: 0; none known

A missing permission check in Jenkins Pipeline: Build Step Plugin 599.v4b_67ea_11b_152 and earlier causes downstream builds awaited by the `waitForBuild` step when the `propagateAbort` parameter is used to be canceled even when the build's authentication lacks Item/Cancel permission on the downstream job.

Patch / fix

fixed in 3

jenkins pipeline:* 601.v6d4c6d1a_9dc7
jenkins pipeline_build_step 601.v6d4c6d1a_9dc7
org.jenkins-ci.plugins pipeline-build-step 601.v6d4c6d1a_9dc7

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 mo ago (2026-09-02)

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Affected products

Jenkins Project Jenkins Pipeline: Build Step Plugin

Classification

Weakness

CWE-862 Missing Authorization

References

jenkins.io /security/advisory/2026-09-02/#SECURITY-3870
vendor-advisory

Sources

CVE List CVE-2026-84661
NVD CVE-2026-84661

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary