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GitLabApplication

CVE-2026-1230

MEDIUM · 6.5 CVSS v3.1 Developing Published 2026-03-11
Fix available
A fix is available. Upgrade to 18.7.6 / 18.8.6 or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click

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 · unedited
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 1.0 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user to cause repository downloads to contain different code than displayed in the web interface due to incorrect validation of branch references under certain circumstances.

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 · low confidence
Developing — this CVE was published recently and its authoritative NVD entry is still being established, so we're holding a technical summary until the source data settles rather than publish something unreliable. Re-checking after 2026-07-30.

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
Affected:>= 1.0.0, < 18.7.6>= 18.8.0, < 18.8.6>= 18.9.0, < 18.9.2

CVSS 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
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

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 · scoped
Upgrade available Upgrade to 18.7.6 / 18.8.6 / 18.9.2 or later
Fixed in 18.7.618.8.618.9.2
Recommended fix High confidence

18.7.6, 18.8.6, or 18.9.2 (select based on your current version branch)

  1. 1. Determine your current GitLab version by navigating to the GitLab admin area or running `gitlab-rake gitlab:env:info`
  2. 2. Create a complete backup of your GitLab instance using `gitlab-backup-create` or the omnibus backup tool
  3. 3. Schedule a maintenance window as upgrades may require downtime
  4. 4. If your current version is < 18.7.6, upgrade to 18.7.6 or later
  5. 5. If your current version is >= 18.8.0 and < 18.8.6, upgrade to 18.8.6 or later
  6. 6. If your current version is >= 18.9.0 and < 18.9.2, upgrade to 18.9.2 or later
  7. 7. After upgrade, verify the GitLab instance is operational and test branch reference functionality
Caveat Standard GitLab upgrade considerations apply; review release notes for your version branch for any migration requirements

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-1230 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data