CVE-2026-84664Network attack vectorHinoki check available

SSRF via Stapler-bound global connection overwrite

Published Sep 2, 2026 · Updated Sep 2, 2026

SSRF in Jenkins Project GitLab Plugin 1.9.16 and earlier allows remote authenticated users to send API requests to attacker-chosen URLs. A DataBoundConstructor exposes DataBoundSetter methods to Stapler form binding, which overwrites the global GitLab connection configuration with untrusted values. A user able to submit the affected forms can redirect connections and expose administrator-configured GitLab API tokens to an attacker-controlled endpoint.

CVSS severity5.4
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SSRF in Jenkins Project GitLab Plugin 1.9.16 and earlier allows remote authenticated users to send API requests to attacker-chosen URLs. A DataBoundConstructor exposes DataBoundSetter methods to Stapler form binding, which overwrites the global GitLab connection configuration with untrusted values. A user able to submit the affected forms can redirect connections and expose administrator-configured GitLab API tokens to an attacker-controlled endpoint.

The record

CVE
CVE-2026-84664
Published
Sep 2, 2026
Updated
Sep 2, 2026
Vendor
Jenkins Project
Product
GitLab Plugin
Classifications
CWE-471, CWE-494
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 <=1.9.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · GitLab Pluginversion=0 <=1.9.16

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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.

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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-471Modification of Assumed-Immutable Data (MAID)
CWE-494Download of Code Without Integrity Check

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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