# CVE-2022-2778: Security feature bypass in Octopus Server

> Attackers can bypass login rate limiting in Octopus Server using null bytes, potentially facilitating brute-force attacks.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Sep 2022
- **Updated:** 20 May 2025
- **Also known as:** GHSA-xh2c-fh83-6hgx

## What is CVE-2022-2778?

CVE-2022-2778 is a critical vulnerability in Octopus Octopus Server, published on 30 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In affected versions of Octopus Deploy it is possible to bypass rate limiting on login using null bytes.

## Which versions are affected by CVE-2022-2778?

It affects 1 product.


Products: Octopus Octopus Server.

## How do I fix CVE-2022-2778?

No fix has been published for CVE-2022-2778 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-2778 being exploited?

There is no known exploitation of CVE-2022-2778 in the wild and no public exploit code.

## Other vulnerabilities in Octopus Octopus Server

- [CVE-2022-2572](https://insights.sbomify.com/CVE-2022-2572/): Auth bypass in Octopus Server (critical 9.8)
- [CVE-2018-11320](https://insights.sbomify.com/CVE-2018-11320/): Information disclosure in n/a (critical 9.8)
- [CVE-2022-2782](https://insights.sbomify.com/CVE-2022-2782/): Auth bypass in Octopus Server (critical 9.1)
- [CVE-2024-2975](https://insights.sbomify.com/CVE-2024-2975/): Race condition in Octopus Server (high 8.8)
- [CVE-2022-4009](https://insights.sbomify.com/CVE-2022-4009/): Command injection in Octopus Server (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-2778 and fix it if it is affected.

What it is: CVE-2022-2778 is a critical vulnerability in Octopus Octopus Server, published on 30 Sep 2022. 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-2022-2778 in the wild and no public exploit code.

Affected product: Octopus Octopus Server. 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-2022-2778/ (Markdown: https://insights.sbomify.com/CVE-2022-2778/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-2778
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-2778
- OSV: https://osv.dev/vulnerability/CVE-2022-2778

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-2778/
Summaries are generated and may contain mistakes; the official description above is the record.