Is CVE-2026-6552 in the CISA KEV catalog?

No. CVE-2026-6552 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-6552?

CVE-2026-6552 has a CVSS v3 base score of 8.7 (HIGH).

What is the EPSS score for CVE-2026-6552?

CVE-2026-6552 has an EPSS score of 0.28% (19th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2026-6552

HIGH

8.7

CVSS v3

NVD

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 15.5 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with group Owner role to take over another group member's GitLab account due to improper authorization in the Group SAML identity management functionality.

CWE-639

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.28%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% 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 2026-06-11.