GitLabApplication
CVE-2026-1402
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedGitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.1 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that under certain conditions could have allowed an authenticated user to cause denial of service due to insufficient validation.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceGitLab CE/EE versions 17.1 through 18.10.6, 18.11.3, and 19.0.0 contain an insufficient validation flaw that allows authenticated users to trigger a denial of service condition. The vulnerability requires user authentication but can be exploited to cause service disruption.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
GitLabApplication
>= 17.1.0, < 18.10.7>= 18.11.0, < 18.11.4= 19.0.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed GitLab versionRun `sudo gitlab-rake gitlab:env:info` or access the GitLab admin dashboard Help section to retrieve the exact version numberAffected if The displayed version is 17.1.0 through 18.10.6, 18.11.3, or 19.0.0 specifically
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Compare version against affected rangesDetermine if the installed version falls into any of these ranges: >= 17.1.0 AND < 18.10.7, OR >= 18.11.0 AND < 18.11.4, OR equals exactly 19.0.0Affected if Version matches any of these vulnerable ranges
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Confirm authenticated access is possibleCheck whether user authentication is enabled by verifying active user accounts exist or that user registration is permitted in Settings > General > Visibility and access controlsAffected if The instance allows authenticated user access
If the installed GitLab version falls within the affected ranges AND the instance permits authenticated user access, the environment is vulnerable to the denial of service condition described in this CVE.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped18.10.718.11.4
Upgrade GitLab to version 18.10.7, 18.11.4, 19.0.1 or later. For environments unable to upgrade immediately, restrict authenticated access and monitor for unusual activity patterns.
18.10.7 (or later), 18.11.4 (or later), or 19.0.1 (or later) depending on your branch
- 1. Back up your GitLab instance data and configuration before proceeding
- 2. Identify your current GitLab version by running: sudo gitlab-rake gitlab:env:info
- 3. For GitLab 17.x installations: upgrade to version 18.10.7 or later
- 4. For GitLab 18.11.x installations: upgrade to version 18.11.4 or later
- 5. For GitLab 19.0.0 installations: upgrade to version 19.0.1 or later
- 6. After upgrade, verify the new version: sudo gitlab-rake gitlab:env:info
- 7. Test that GitLab services are running: sudo gitlab-ctl status
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in GitLab
Scoped from the published advisory
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-1402 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-1402 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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