How severe is CVE-2026-1387?

CVE-2026-1387 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-1387 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1387?

CVE-2026-1387 affects Gitlab. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1387?

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

Does CVE-2026-1387 have an EU (EUVD) identifier?

Yes. CVE-2026-1387 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6256.

When was CVE-2026-1387 published?

CVE-2026-1387 was published on 2026-02-11 and last updated on 2026-06-17.

CVE-2026-1387

CVE-2026-1387 is a medium-severity vulnerability in Gitlab with a CVSS 3.x base score of 6.5. 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-770.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6256
Weakness: CWE-770
Affected product: Gitlab
Published: 2026-02-11
Last modified: 2026-06-17

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 15.6 before 18.6.6, 18.7 before 18.7.4, and 18.8 before 18.8.4 that could have allowed an authenticated user to cause Denial of Service by uploading a malicious file and repeatedly querying it through GraphQl.

Frequently asked questions

What is CVE-2026-1387?: GitLab has remediated an issue in GitLab EE affecting all versions from 15.6 before 18.6.6, 18.7 before 18.7.4, and 18.8 before 18.8.4 that could have allowed an authenticated user to cause Denial of Service by uploading a malicious file and repeatedly querying it through GraphQl.
How severe is CVE-2026-1387?: CVE-2026-1387 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-1387 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1387?: CVE-2026-1387 affects Gitlab. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1387?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-1387 have an EU (EUVD) identifier?: Yes. CVE-2026-1387 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6256.
When was CVE-2026-1387 published?: CVE-2026-1387 was published on 2026-02-11 and last updated on 2026-06-17.

References

Affected products (1)

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

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