# CVE-2022-27891: Information disclosure in Gotham

> An unauthenticated endpoint in Palantir Gotham exposed active usernames, allowing attackers to enumerate valid users.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Feb 2023
- **Updated:** 18 Mar 2025
- **Also known as:** GHSA-c6x9-mqg2-mmfv

## What is CVE-2022-27891?

CVE-2022-27891 is a medium-severity vulnerability in Palantir Gotham, published on 16 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Palantir Gotham included an unauthenticated endpoint that listed all active usernames on the stack with an active session. The affected services have been patched and automatically deployed to all Apollo-managed Gotham instances. It is highly recommended that customers upgrade all affected services to the latest version. This issue affects: Palantir Gotham versions prior to 103.30221005.0.

Weakness: CWE-306 (Missing Authentication for Critical Functionality), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2022-27891?

It affects 1 product.


Products: Palantir Gotham.

## How do I fix CVE-2022-27891?

No fix has been published for CVE-2022-27891 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-27891 being exploited?

There is no known exploitation of CVE-2022-27891 in the wild and no public exploit code.

## Other vulnerabilities in Palantir Gotham

- [CVE-2022-27892](https://insights.sbomify.com/CVE-2022-27892/): Palantir Gotham included an endpoint that would log arbitrary sized payloads. (medium 5.3)
- [CVE-2022-27897](https://insights.sbomify.com/CVE-2022-27897/): Palantir Gotham included an endpoint that would log arbitrary sized zip files. (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-27891 and fix it if it is affected.

What it is: CVE-2022-27891 is a medium-severity vulnerability in Palantir Gotham, published on 16 Feb 2023. 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-2022-27891 in the wild and no public exploit code.

Affected product: Palantir Gotham. 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-2022-27891/ (Markdown: https://insights.sbomify.com/CVE-2022-27891/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-27891
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-27891
- OSV: https://osv.dev/vulnerability/CVE-2022-27891

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-27891/
Summaries are generated and may contain mistakes; the official description above is the record.