# CVE-2026-111641: FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpoints

> Unauthenticated attackers can bypass authentication via auto-login endpoints to gain full administrative control over the FastapiAdmin application.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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 Oct 2026
- **Updated:** 16 Oct 2026
- **Also known as:** GHSA-xj6f-6mc4-xhqp

## What is CVE-2026-111641?

CVE-2026-111641 is a critical authentication bypass vulnerability in FastapiAdmin, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

FastapiAdmin through 3.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain sessions for any user by abusing unprotected auto-login endpoints. Attackers can list users via /api/v1/auth/auto-login/users, mint a superuser auto-login token, and exchange it for a JWT session to gain full administrative control.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-111641?


## How do I fix CVE-2026-111641?

No fix has been published for CVE-2026-111641 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-111641 being exploited?

There is no known exploitation of CVE-2026-111641 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-111641 and fix it if it is affected.

What it is: CVE-2026-111641 is a critical authentication bypass vulnerability in FastapiAdmin, published on 16 Oct 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-2026-111641 in the wild and no public exploit code.

Affected product: FastapiAdmin. 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-2026-111641/ (Markdown: https://insights.sbomify.com/CVE-2026-111641/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-111641
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111641
- OSV: https://osv.dev/vulnerability/CVE-2026-111641

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-111641/
Summaries are generated and may contain mistakes; the official description above is the record.