# CVE-2020-37041: OpenCTI 3.3.1 - Directory Traversal

> Unauthenticated attackers can read arbitrary files from the server filesystem via path traversal in the static CSS endpoint.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Jan 2026
- **Updated:** 5 Mar 2026
- **Also known as:** GHSA-wvqh-8vgx-x89q, PYSEC-2026-114

## What is CVE-2020-37041?

CVE-2020-37041 is a high-severity path traversal vulnerability in Filigran OpenCTI, published on 30 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

OpenCTI 3.3.1 is vulnerable to a directory traversal attack via the static/css endpoint. An unauthenticated attacker can read arbitrary files from the filesystem by sending crafted GET requests with path traversal sequences (e.g., '../') in the URL. For example, requesting /static/css//../../../../../../../../etc/passwd returns the contents of /etc/passwd. This vulnerability was discovered by Raif Berkay Dincel and confirmed on Linux Mint and Windows 10.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2020-37041?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `pycti` | PyPI | All versions to 3.3.1 | None |

Products: Citeum Opencti.

## How do I fix CVE-2020-37041?

No fix has been published for CVE-2020-37041 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-37041 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37041 exists.

## Other vulnerabilities in Filigran OpenCTI

- [CVE-2026-27960](https://insights.sbomify.com/CVE-2026-27960/): OpenCTI privilege escalation and unauthenticated access via default admin account (critical 9.8)
- [CVE-2026-39980](https://insights.sbomify.com/CVE-2026-39980/): OpenCTI affected by RCE via notifier template (critical 9.1)
- [CVE-2025-24977](https://insights.sbomify.com/CVE-2025-24977/): OpenCTI has remote code execution and sensitive secrets exposed through web hook (critical 9.1)
- [CVE-2024-26139](https://insights.sbomify.com/CVE-2024-26139/): OpenCTI Authenticated Privilege Escalation (high 8.3)
- [CVE-2024-45404](https://insights.sbomify.com/CVE-2024-45404/): OpenCTI's lack of Rate Limit lead to OTP brute forcing (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-37041 and fix it if it is affected.

What it is: CVE-2020-37041 is a high-severity path traversal vulnerability in Filigran OpenCTI, published on 30 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37041 exists.

Affected packages and fixed versions:
- pycti (PyPI): affected all versions up to 3.3.1; no fix listed

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-2020-37041/ (Markdown: https://insights.sbomify.com/CVE-2020-37041/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-37041
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-37041
- OSV: https://osv.dev/vulnerability/CVE-2020-37041

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-37041/
Summaries are generated and may contain mistakes; the official description above is the record.