CVE-2021-22166
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request...
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request with a malformed method
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request with a malformed method
- Record
CVE-2021-22166- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
EUVDEUVD-2021-9312
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request with a malformed method
- Record
EUVD-2021-9312- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fj94-q44p-pf8f No score
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request...
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request with a malformed method
- Record
GHSA-fj94-q44p-pf8f- Weakness
- CWE-400
- Updated
- 2026-11-02
NVD
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request with a malformed method
- Record
CVE-2021-22166- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request with a malformed method
- Record
CVE-2021-22166- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-22166
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request with a malformed method
- Record
UBUNTU-CVE-2021-22166- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
OSVBIT-gitlab-2021-22166 No score
An attacker could cause a Prometheus denial of service in GitLab 13.7+ by sending an HTTP request with a malformed method
- Record
BIT-gitlab-2021-22166- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-22166 is a medium vulnerability (CVSS 5.3) in Gitlab, published January 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.39%, the 72nd percentile. Fixed in gitlab 13.7.2.
References
gitlab.com/gitlab-org/labkit/-/issues/29
nvd.nist.gov/vuln/detail/CVE-2021-22166
github.com/advisories/GHSA-fj94-q44p-pf8f
ubuntu.com/security/CVE-2021-22166
about.gitlab.com/releases/2021/01/07/security-release-gitlab-13-7-2-released
cve.org/CVERecord?id=CVE-2021-22166