CVE-2021-39893
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed...
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.
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
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.
- Record
CVE-2021-39893- 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-2021-26249
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.
- Record
EUVD-2021-26249- 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-mvf7-889j-9c49 No score
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed...
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.
- Record
GHSA-mvf7-889j-9c49- Weakness
- CWE-862
- Updated
- 2026-11-02
NVD
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.
- Record
CVE-2021-39893- 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-862
- Updated
- 2026-11-02
OSV
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.
- Record
CVE-2021-39893- 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-2021-39893
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.
- Record
UBUNTU-CVE-2021-39893- 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-2021-39893 No score
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.
- Record
BIT-gitlab-2021-39893- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| 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-2021-39893 is a medium vulnerability (CVSS 5.3) in Gitlab, published October 5, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.26%, the 69th percentile. Fixed in gitlab 14.1.7.