# CVE-2025-64422: Rate-limit bypass on login via X-Forwarded-Host header

> Attackers can bypass login rate limits by manipulating headers, enabling unlimited brute-force attacks against user and admin accounts in Coolify.

- **Severity:** Medium 5.5 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Jan 2026
- **Updated:** 5 Jan 2026
- **Also known as:** GHSA-688j-rm43-5r8x

## What is CVE-2025-64422?

CVE-2025-64422 is a medium-severity vulnerability in coollabsio coolify, published on 5 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. In Coolify vstarting with version 4.0.0-beta.434, the /login endpoint advertises a rate limit of 5 requests but can be trivially bypassed by rotating the X-Forwarded-For header. This enables unlimited credential stuffing and brute-force attempts against user and admin accounts. As of time of publication, it is unclear if a patch is available.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2025-64422?

It affects 1 product.


Products: Coollabs Coolify.

## How do I fix CVE-2025-64422?

No fix has been published for CVE-2025-64422 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-64422 being exploited?

There is no known exploitation of CVE-2025-64422 in the wild and no public exploit code.

## Other vulnerabilities in coollabsio coolify

- [CVE-2025-59157](https://insights.sbomify.com/CVE-2025-59157/): Coolify has Git Repository RCE (critical 10.0)
- [CVE-2025-64420](https://insights.sbomify.com/CVE-2025-64420/): Coolify members can see private key of root user (critical 10.0)
- [CVE-2025-66209](https://insights.sbomify.com/CVE-2025-66209/): Coolify Vulnerable to Authenticated Remote Code Execution via Command Injection in Database Backup (critical 10.0)
- [CVE-2025-22609](https://insights.sbomify.com/CVE-2025-22609/): Coolify Vulnerable to Private Key Hijacking / Remote Command Execution (RCE) (critical 10.0)
- [CVE-2025-22611](https://insights.sbomify.com/CVE-2025-22611/): Coolify vulnerable to Privilege Escalation resulting in Remote Command Execution (RCE) (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-64422 and fix it if it is affected.

What it is: CVE-2025-64422 is a medium-severity vulnerability in coollabsio coolify, published on 5 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-64422 in the wild and no public exploit code.

Affected product: coollabsio coolify. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2025-64422/ (Markdown: https://insights.sbomify.com/CVE-2025-64422/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-64422
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-64422
- OSV: https://osv.dev/vulnerability/CVE-2025-64422

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-64422/
Summaries are generated and may contain mistakes; the official description above is the record.