# CVE-2021-39935: GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF)

> Unauthorized external users can perform Server Side Requests via the CI Lint API, potentially accessing internal resources.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Yes, since 3 Feb 2026 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Dec 2021
- **Updated:** 3 Feb 2026
- **Also known as:** BIT-gitlab-2021-39935, GHSA-22hj-9cx7-p2hw, UBUNTU-CVE-2021-39935

## What is CVE-2021-39935?

CVE-2021-39935 is a medium-severity server-side request forgery vulnerability in Gitlab Gitlab, published on 13 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform Server Side Requests via the CI Lint API

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2021-39935?

1 open source package ship an affected version, including gitlab. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `gitlab` | Bitnami | From 10.5.0 | 14.3.6, 14.4.4, 14.5.2 |

Products: Gitlab Gitlab.

## How do I fix CVE-2021-39935?

Upgrade gitlab to a fixed version for your release line: 14.3.6, 14.4.4 or 14.5.2. US federal agencies must fix it by 24 Feb 2026.

## Is CVE-2021-39935 being exploited?

Yes. Attackers have exploited CVE-2021-39935 in the wild since at least 3 Feb 2026.

## Other vulnerabilities in Gitlab Gitlab

- [CVE-2026-97229](https://insights.sbomify.com/CVE-2026-97229/): GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound (critical 10.0, exploited in the wild)
- [CVE-2026-85706](https://insights.sbomify.com/CVE-2026-85706/): GitLab Community Edition and Enterprise Edition Path Traversal (critical 10.0, exploited in the wild)
- [CVE-2023-7028](https://insights.sbomify.com/CVE-2023-7028/): GitLab Community and Enterprise Editions Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2021-22205](https://insights.sbomify.com/CVE-2021-22205/): GitLab Community and Enterprise Editions Remote Code Execution (critical 10.0, exploited in the wild)
- [CVE-2021-22175](https://insights.sbomify.com/CVE-2021-22175/): GitLab Server-Side Request Forgery (SSRF) (medium 6.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-39935 and fix it if it is affected.

What it is: CVE-2021-39935 is a medium-severity server-side request forgery vulnerability in Gitlab Gitlab, published on 13 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2021-39935 in the wild since at least 3 Feb 2026.

Affected packages and fixed versions:
- gitlab (Bitnami): affected from 10.5.0; fixed in 14.3.6, 14.4.4, 14.5.2

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-39935/ (Markdown: https://insights.sbomify.com/CVE-2021-39935/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-39935
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-39935
- OSV: https://osv.dev/vulnerability/CVE-2021-39935

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-39935/
Summaries are generated and may contain mistakes; the official description above is the record.