CVE-2026-84660Network attack vectorHinoki check available

Downstream build cancellation via missing permission check

Published Sep 2, 2026 · Updated Sep 2, 2026

Missing authorization in Pipeline: Build Step Plugin 599.v4b_67ea_11b_152 and earlier allows remote authenticated users to cancel downstream builds. The build step's cancellation path propagates a Pipeline abort to its triggered build without verifying Item/Cancel on the downstream job. The flaw matters when a build runs under restricted authentication rather than the default unconstrained SYSTEM identity, and its bounded impact is interruption of the downstream build.

CVSS severity5.4
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in Pipeline: Build Step Plugin 599.v4b_67ea_11b_152 and earlier allows remote authenticated users to cancel downstream builds. The build step's cancellation path propagates a Pipeline abort to its triggered build without verifying Item/Cancel on the downstream job. The flaw matters when a build runs under restricted authentication rather than the default unconstrained SYSTEM identity, and its bounded impact is interruption of the downstream build.

The record

CVE
CVE-2026-84660
Published
Sep 2, 2026
Updated
Sep 2, 2026
Vendor
Jenkins Project
Product
Pipeline: Build Step Plugin
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=599.v4b_67ea_11b_152

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · Pipeline: Build Step Pluginversion=0 <=599.v4b_67ea_11b_152

Published CVSS scores

5.4CISACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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-862Missing Authorization

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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