NVD / CVE Program· CNA GitLab

CVE-2026-12910: Missing Authentication for Critical Function in GitLab

Noroxi assessment

Priority: Monitor (action score 21/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.34% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: GitLab GitLab 19.1.8, 19.2.6, 19.3.2.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to GitLab GitLab 19.1.8, 19.2.6, 19.3.2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.6 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed an authenticated user to bypass SAML SSO sign-in restrictions and authenticate without SSO due to missing authentication enforcement checks.

MediumCVSS 5.4 · v3.1—No exploit Fix available

Auth bypass

EUVD-2026-78909

Published: Sep 15, 2026
Updated: Sep 28, 2026
EPSS: 0.3% · 27th percentile
CWE: CWE-306

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 21 / 40 · 5.4 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitLab: 5.4; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
gitlab	gitlab	cpe:2.3:a:gitlab:gitlab

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

gitlab gitlab18.6.0 and later · before 19.1.8
gitlab gitlab19.2.0 and later · before 19.2.6
gitlab gitlab19.3.0 and later · before 19.3.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitLab). Independent of NVD's CPE analysis and usually ahead of it.

GitLab GitLab
- 18.6 and later · before 19.1.8affected · semver
- 19.2 and later · before 19.2.6affected · semver
- 19.3 and later · before 19.3.2affected · semver

Same product

gitlab: all records

Other highest-scoring records for the same primary product.

CVE-2021-22205An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.9.KEV
100Now
CVE-2026-85706Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in GitLabKEV
99Now
CVE-2023-7028Weak Password Recovery Mechanism for Forgotten Password in GitLabKEV
97Now

Published before and after this one in the same product

← EarlierCVE-2026-75871Aug 27, 2026 · Server-Side Request Forgery (SSRF) in GitLab AI Gateway
38Monitor
← EarlierCVE-2026-87719Sep 12, 2026 · Deserialization of Untrusted Data in GitLab
39Monitor
Later →CVE-2026-13210Sep 15, 2026 · Incorrect Authorization in GitLab
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
GitLab GitLab	19.1.8	Vendor (CNA)
GitLab GitLab	19.2.6	Vendor (CNA)
GitLab GitLab	19.3.2	Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

[theluci](https://hackerone.com/theluci)finder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-1724174 days apartMissing Authentication for Critical Function in GitLab
30Monitor
CVE-2025-1754446 days apartMissing Authentication for Critical Function in GitLab
21Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-877193 days apartDeserialization of Untrusted Data in GitLab
39Monitor
CVE-2026-935778 days apartInteger Overflow or Wraparound in GitLab
39Monitor
CVE-2026-887650 days apartImproper Neutralization of Special Elements used in a Command ('Command Injection') in GitLab
34Monitor
CVE-2026-167941 days apartMissing Authorization in GitLab
17Monitor

Bug bounty scope

GitLabHackerOne · paid

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-1108 · Sep 16, 2026(GitLab CE/EE Güvenlik Bildirimi )

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: low · data can be read
Integrity: low · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: Low
Availability impact: None

Weakness class (CWE)

CWE-306 · Missing Authentication for Critical Function

CVSS vector

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

nvd-secondary

Root cause

A function added for development or support ships to production without authentication. It often relies on the assumption that it is “only reachable from the internal network.”

The bug in code

The whole CWE-306 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1// Added for the support team
2app.post("/maintenance/reset", resetDevice);

Fixed

1if (config.maintenanceEnabled) {
2  app.post(
3    "/maintenance/reset",
4    requireSession, requireRole("admin"), resetDevice
5  );
6}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:08 PM UTC

For records you follow, these changes also arrive as notifications. →

References

gitlab.com/gitlab-org/gitlab/-/work_items/603742

Show all references (1 more)

hackerone.com/reports/3745561

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records