CVE-2024-0456Public exploitNetwork attack vector

Unauthorized assignee changes via overbroad update permission

Published Jan 26, 2024 · Updated Jun 15, 2026

Authorization bypass in GitLab 14.0 through 16.6.5, 16.7 through 16.7.3, and 16.8.0 allows remote authenticated users to alter MR assignees. MergeRequests::UpdateAssigneesService and UpdateReviewersService accepted the broad update_merge_request permission instead of a stricter metadata permission. Any authenticated author, including a project non-member, could alter assignees or reviewers on an owned merge request through REST or GraphQL.

CVSS severity4.3
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in GitLab 14.0 through 16.6.5, 16.7 through 16.7.3, and 16.8.0 allows remote authenticated users to alter MR assignees. MergeRequests::UpdateAssigneesService and UpdateReviewersService accepted the broad update_merge_request permission instead of a stricter metadata permission. Any authenticated author, including a project non-member, could alter assignees or reviewers on an owned merge request through REST or GraphQL.

The record

CVE
CVE-2024-0456
Published
Jan 26, 2024
Updated
Jun 15, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-425, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 15, 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=14.0 <16.6.6
  2. Affected versionversion=16.7 <16.7.4
  3. Affected versionversion=16.8 <16.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=14.0 <16.6.6; version=16.7 <16.7.4; version=16.8 <16.8.1

Published CVSS scores

4.3GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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 exploitPublished

Weakness, pattern, technique

CWE-425Direct Request ('Forced Browsing')
T1565.001Stored Data Manipulation

Public exploit references

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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