How severe is CVE-2026-5309?

CVE-2026-5309 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-5309 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5309?

CVE-2026-5309 primarily affects Gitlab. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-5309?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-5309 have an EU (EUVD) identifier?

Yes. CVE-2026-5309 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39175.

When was CVE-2026-5309 published?

CVE-2026-5309 was published on 2026-06-25 and last updated on 2026-06-26.

CVE-2026-5309

CVE-2026-5309 is a medium-severity vulnerability in Gitlab with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39175
Weakness: CWE-639
Affected product: Gitlab
Published: 2026-06-25
Last modified: 2026-06-26

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 18.6 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user to read or modify another group's virtual registry cleanup policy settings without authorization.

Frequently asked questions

What is CVE-2026-5309?: GitLab has remediated an issue in GitLab EE affecting all versions from 18.6 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user to read or modify another group's virtual registry cleanup policy settings without authorization.
How severe is CVE-2026-5309?: CVE-2026-5309 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-5309 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5309?: CVE-2026-5309 primarily affects Gitlab. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-5309?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5309 have an EU (EUVD) identifier?: Yes. CVE-2026-5309 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39175.
When was CVE-2026-5309 published?: CVE-2026-5309 was published on 2026-06-25 and last updated on 2026-06-26.

References

Affected products (2)

cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:gitlab:gitlab:19.1.0:*:*:*:enterprise:*:*:*

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