Is CVE-2026-1388 in the CISA KEV catalog?

No. CVE-2026-1388 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-1388?

CVE-2026-1388 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2026-1388?

CVE-2026-1388 has an EPSS score of 0.36% (27th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2026-1388

HIGH

7.5

CVSS v3

NVD

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.2 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an unauthenticated user to cause regular expression denial of service by sending specially crafted input to a merge request endpoint under certain conditions.

CWE-1333

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.36%probability of exploitation in 30 days

27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-28.