CVE-2021-39939 json
An uncontrolled resource consumption vulnerability in GitLab Runner affecting all versions starting from 13.7 before 14.3.6, all versions s…
published 2021-12-13 4 y ago modified 2026-09-08 2 mo ago also BIT-gitlab-2021-39939 , EUVD-2021-26295
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
An uncontrolled resource consumption vulnerability in GitLab Runner affecting all versions starting from 13.7 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allows an attacker triggering a job with a specially crafted docker image to exhaust resources on runner manager
Patch / fix
- bitnami gitlab 14.3.6, 14.4.4, 14.5.2
- gitlab gitlab 14.3.6, 14.4.4, 14.5.2
- gitlab-runner Arch Linux 14.5.2-1
arch linux advisories AVG-2619
Exploit prediction
0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitlab | >=13.7.0, <14.3.6 >=14.4.0, <14.4.4 >=14.5.0, <14.5.2 |
14.3.6 14.4.4 14.5.2 |
Affected products
- GitLab GitLab Runner
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
- Technology feeds
References
-
gitlab.com
/gitlab-org/gitlab-runner/-/issues/28630
broken-link, web
-
gitlab.com
/gitlab-org/cves/-/blob/master/2021/CVE-2021-39939.json
third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-39939
web
Sources
- CVE List CVE-2021-39939
- NVD CVE-2021-39939
- OSV BIT-gitlab-2021-39939
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.