CVE-2026-6976Network attack vector

Code-review evasion via mishandled file names

Published Jun 11, 2026 · Updated Jun 11, 2026

Authorization bypass in affected GitLab CE/EE versions allows remote authenticated users to hide changes from merge request diff views. Merge request diff processing improperly handles attacker-controlled file names, causing selected changes to be omitted from the review view. Exploitation requires Developer-role access and a reviewer to inspect the affected merge request; the hidden repository changes can evade code review.

CVSS severity3.7
Low
EPSS probability0.16%
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 affected GitLab CE/EE versions allows remote authenticated users to hide changes from merge request diff views. Merge request diff processing improperly handles attacker-controlled file names, causing selected changes to be omitted from the review view. Exploitation requires Developer-role access and a reviewer to inspect the affected merge request; the hidden repository changes can evade code review.

The record

CVE
CVE-2026-6976
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-639, T1195.002
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=15.9 <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=15.9 <18.10.8; version=18.11 <18.11.5; version=19.0 <19.0.2

Published CVSS scores

3.7GitLab Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:R/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-639Authorization Bypass Through User-Controlled Key
T1195.002Compromise Software Supply Chain

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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