CVE-2026-6269Network attack vector

Developer-role modification of hidden merge requests

Published Jun 11, 2026 · Updated Jun 11, 2026

Incorrect authorization in GitLab CE/EE allows remote authenticated users with Developer access to modify hidden merge requests. GitLab identifies the Merge Requests API as the locus but has not disclosed the request path, controller, policy, failed permission check, or other required conditions. Affected versions are 15.10 through 18.10.7, 18.11 through 18.11.4, and 19.0 through 19.0.1; the demonstrated consequence is unauthorized alteration of hidden merge-request data.

CVSS severity5.4
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in GitLab CE/EE allows remote authenticated users with Developer access to modify hidden merge requests. GitLab identifies the Merge Requests API as the locus but has not disclosed the request path, controller, policy, failed permission check, or other required conditions. Affected versions are 15.10 through 18.10.7, 18.11 through 18.11.4, and 19.0 through 19.0.1; the demonstrated consequence is unauthorized alteration of hidden merge-request data.

The record

CVE
CVE-2026-6269
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-863, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 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=15.10 <18.10.8
  2. Affected versionversion=18.11 <18.11.5
  3. Affected versionversion=19.0 <19.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=15.10 <18.10.8; version=18.11 <18.11.5; version=19.0 <19.0.2

Published CVSS scores

5.4GitLab Inc.CVSS: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.

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-863Incorrect Authorization
T1565.001Stored Data Manipulation

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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