Vulnerability · Published Oct 13, 2026 · Assigned by GitLab
CVE-2026-100755Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab
Medium 4.6
In plain English
A medium-severity security flaw in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 0% of all known vulnerabilities).
Severity (CVSS 3.1)4.6Medium
Exploit odds (30 days)<0.1%top 99.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-349 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L