# CVE-2026-43985: Taultulli has CSRF in /configUpdate via missing anti-CSRF and method restriction that allows admin credential takeover

> Attackers can hijack Tautulli admin accounts via CSRF by tricking admins into visiting malicious pages that overwrite credentials.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Jun 2026
- **Updated:** 4 Jun 2026
- **Also known as:** GHSA-v622-pmjj-gpx3

## What is CVE-2026-43985?

CVE-2026-43985 is a high-severity vulnerability in Tautulli, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose `configUpdate` as a state-changing administrator endpoint, but the route does not enforce `POST` and does not use any anti-CSRF token. In the default form and JWT-based authentication mode, the administrator session cookie is issued with `SameSite=Lax`, which still permits top-level cross-site navigation requests. An attacker can exploit this by luring a logged-in administrator to a malicious page that submits a cross-site request to `/configUpdate` and overwrites the local administrator username and password. The attacker can then sign in directly with the chosen credentials and take over the Tautulli administrative interface. Version 2.17.1 patches the issue.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2026-43985?


## How do I fix CVE-2026-43985?

No fix has been published for CVE-2026-43985 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-43985 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43985 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-43985 and fix it if it is affected.

What it is: CVE-2026-43985 is a high-severity vulnerability in Tautulli, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43985 exists.

Affected product: Tautulli. 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-2026-43985/ (Markdown: https://insights.sbomify.com/CVE-2026-43985/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-43985
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-43985
- OSV: https://osv.dev/vulnerability/CVE-2026-43985

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-43985/
Summaries are generated and may contain mistakes; the official description above is the record.