# CVE-2022-26133: Deserialization in Bitbucket Data Center

> Remote unauthenticated attackers can execute arbitrary code via Java deserialization in Atlassian Bitbucket Data Center.

- **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:** 20 Apr 2022
- **Updated:** 3 Oct 2024
- **Also known as:** GHSA-2p9p-h8q6-52g9

## What is CVE-2022-26133?

CVE-2022-26133 is a critical unsafe deserialization vulnerability in Atlassian Bitbucket Data Center, published on 20 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SharedSecretClusterAuthenticator in Atlassian Bitbucket Data Center versions 5.14.0 and later before 7.6.14, 7.7.0 and later prior to 7.17.6, 7.18.0 and later prior to 7.18.4, 7.19.0 and later prior to 7.19.4, and 7.20.0 allow a remote, unauthenticated attacker to execute arbitrary code via Java deserialization.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2022-26133?

It affects 1 product.


Products: Atlassian Bitbucket Data Center.

## How do I fix CVE-2022-26133?

No fix has been published for CVE-2022-26133 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-26133 being exploited?

There is no known exploitation of CVE-2022-26133 in the wild and no public exploit code.

Public exploit code:

- Atlassian Bitbucket Data Center RCE(CVE-2022-26133) verification. (github_poc): https://github.com/Pear1y/CVE-2022-26133
- CVE-2022-26133 Exploit  (github_poc): https://github.com/abbarhissarh/CVE-2022-26133

## Other vulnerabilities in Atlassian Bitbucket Data Center

- [CVE-2023-22513](https://insights.sbomify.com/CVE-2023-22513/): Code injection in Bitbucket Data Center (high 8.5)
- [CVE-2024-21684](https://insights.sbomify.com/CVE-2024-21684/): Open redirect in Bitbucket Data Center (low 3.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-26133 and fix it if it is affected.

What it is: CVE-2022-26133 is a critical unsafe deserialization vulnerability in Atlassian Bitbucket Data Center, published on 20 Apr 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-2022-26133 in the wild and no public exploit code.

Affected product: Atlassian Bitbucket Data Center. 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-2022-26133/ (Markdown: https://insights.sbomify.com/CVE-2022-26133/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-26133
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-26133
- OSV: https://osv.dev/vulnerability/CVE-2022-26133

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-26133/
Summaries are generated and may contain mistakes; the official description above is the record.