CVE-2026-5816
Improper Resolution of Path Equivalence in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Improper Resolution of Path Equivalence in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
- Record
CVE-2026-5816- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-41
- Updated
- 2026-11-02
EUVDEUVD-2026-25046
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
- Record
EUVD-2026-25046- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-gj6x-vqpx-4p3c
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4...
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
- Record
GHSA-gj6x-vqpx-4p3c- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-41
- Updated
- 2026-11-02
NVD
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
- Record
CVE-2026-5816- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-41
- Updated
- 2026-11-02
OSV
Improper Resolution of Path Equivalence in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
- Record
CVE-2026-5816- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-41
- Updated
- 2026-11-02
OSVBIT-gitlab-2026-5816 No score
Improper Resolution of Path Equivalence in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
- Record
BIT-gitlab-2026-5816- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
gitlabBitnami |
18.10.0 up to 18.10.4, 18.11.0 up to 18.11.1 | 18.10.418.11.1 |
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-2026-5816 is a high vulnerability (CVSS 8.0) in Gitlab, published April 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. Fixed in gitlab 18.10.4.
References
hackerone.com/reports/3572231
gitlab.com/gitlab-org/gitlab/-/work_items/592816
about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released
nvd.nist.gov/vuln/detail/CVE-2026-5816
github.com/advisories/GHSA-gj6x-vqpx-4p3c