# CVE-2026-41065: Tautulli Vulnerable to Unauthenticated/Authenticated Remote Code Execution via Newsletter Custom Template Directory

> Attackers can execute arbitrary code by pointing newsletter templates to malicious shares, affecting fresh installs without authentication or admin accounts.

- **Severity:** High 8.9 (`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/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Jun 2026
- **Updated:** 4 Jun 2026
- **Also known as:** GHSA-68qx-mcf5-3jcp

## What is CVE-2026-41065?

CVE-2026-41065 is a high-severity code injection vulnerability in Tautulli, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 are vulnerable to remote code execution via the newsletter custom template directory feature. On a fresh install before the setup wizard is completed, all management endpoints are completely unauthenticated. An attacker can create a newsletter agent, point the custom template directory to an attacker-controlled SMB share serving a malicious Mako template, and trigger execution via the newsletter render endpoint, all with zero credentials and no local access to the target system. On a completed install with credentials configured, the same chain is exploitable by any admin. Version 2.17.1 fixes the issue.

Weakness: CWE-1336 (Improper Neutralization of Special Elements Used in a Template Engine)

## Which versions are affected by CVE-2026-41065?


## How do I fix CVE-2026-41065?

No fix has been published for CVE-2026-41065 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-41065 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41065 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-41065 and fix it if it is affected.

What it is: CVE-2026-41065 is a high-severity code injection vulnerability in Tautulli, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41065 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-2026-41065/ (Markdown: https://insights.sbomify.com/CVE-2026-41065/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-41065
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41065
- OSV: https://osv.dev/vulnerability/CVE-2026-41065

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-41065/
Summaries are generated and may contain mistakes; the official description above is the record.