What is CVE-2026-100755?

CVE-2026-100755 is a medium-severity vulnerability in GitLab, classified under CWE-349. CVSS score: 4.6/10. Published 2026-10-13.

How severe is CVE-2026-100755?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Vulnerability in GitLab

CVE-2026-100755

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.2 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain deployment configurations, could have allowed an authenticated user to poison cached page content served to other users due to improper cache key construction.

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

GitLab

Weakness classification (CWE)

CWE-349

References

Frequently asked questions

What is CVE-2026-100755?: CVE-2026-100755 is a medium-severity vulnerability in GitLab, classified under CWE-349. CVSS score: 4.6/10. Published 2026-10-13.
How severe is CVE-2026-100755?: Medium severity. CVSS v3 base score is 4.6 out of 10.