# CVE-2026-31831: Tautulli: Unauthenticated Path Traversal in `/newsletter/image/images` endpoint

> Unauthenticated attackers can read arbitrary files from the server filesystem via a path traversal vulnerability in the Tautulli newsletter image endpoint.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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:** 30 Mar 2026
- **Updated:** 31 Mar 2026
- **Also known as:** GHSA-xp55-2pf4-fv8m

## What is CVE-2026-31831?

CVE-2026-31831 is a high-severity path traversal vulnerability in Tautulli, published on 30 Mar 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. Prior to version 2.17.0, the /newsletter/image/images API endpoint is vulnerable to path traversal, allowing unauthenticated attackers to read arbitrary files from the application server's filesystem. This issue has been patched in version 2.17.0.

Weakness: CWE-23 (Relative Path Traversal)

## Which versions are affected by CVE-2026-31831?

It affects 1 product.


Products: Tautulli Tautulli.

## How do I fix CVE-2026-31831?

No fix has been published for CVE-2026-31831 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-31831 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31831 exists.

Public exploit code:

- Tautulli <= 2.16.1 - Path Traversal (nuclei): http/cves/2026/CVE-2026-31831.yaml

## Other vulnerabilities in Tautulli

- [CVE-2025-58762](https://insights.sbomify.com/CVE-2025-58762/): Tautulli vulnerable to Authenticated Remote Code Execution via write primitive and `Script` notification agent (critical 9.1)
- [CVE-2025-58760](https://insights.sbomify.com/CVE-2025-58760/): Tautulli vulnerable to Unauthenticated Path Traversal in `/image` endpoint (high 8.6)
- [CVE-2025-58761](https://insights.sbomify.com/CVE-2025-58761/): Tautulli vulnerable to Unauthenticated Path Traversal in `real_pms_image_proxy` (high 8.6)
- [CVE-2025-58763](https://insights.sbomify.com/CVE-2025-58763/): Tautulli vulnerable to Authenticated Remote Code Execution via Command Injection (high 8.1)
- [CVE-2026-28505](https://insights.sbomify.com/CVE-2026-28505/): Tautulli: RCE via eval() sandbox bypass using lambda nested scope to escape co_names whitelist check (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-31831 and fix it if it is affected.

What it is: CVE-2026-31831 is a high-severity path traversal vulnerability in Tautulli, published on 30 Mar 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-2026-31831 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-2026-31831/ (Markdown: https://insights.sbomify.com/CVE-2026-31831/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-31831
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31831
- OSV: https://osv.dev/vulnerability/CVE-2026-31831

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-31831/
Summaries are generated and may contain mistakes; the official description above is the record.