CVE-2026-100755
Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab
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.
- Record
CVE-2026-100755- CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-349
- Updated
- 2026-11-02
EUVDEUVD-2026-98211
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.
- Record
EUVD-2026-98211- CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-xw26-h8vq-gff9
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.2 before 19.2.8, 19...
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.
- Record
GHSA-xw26-h8vq-gff9- CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-349
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-100755- CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-349
- Updated
- 2026-11-02
OSV
Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab
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.
- Record
CVE-2026-100755- CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-349
- Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2026-100755- CVSS 3.1
- 4.6 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
OSVBIT-gitlab-2026-100755 No score
Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab
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.
- Record
BIT-gitlab-2026-100755- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-100755 is a medium vulnerability (CVSS 4.6) in Gitlab, published October 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.09%, the 0th percentile. Fixed in gitlab 19.2.8.
References
gitlab.com/gitlab-org/gitlab/-/work_items/627507
docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-released
nvd.nist.gov/vuln/detail/CVE-2026-100755
github.com/advisories/GHSA-xw26-h8vq-gff9
ubuntu.com/security/CVE-2026-100755
cve.org/CVERecord?id=CVE-2026-100755