# CVE-2026-92164: Streamlink: HTTPSession follows HTTP redirects into file:// URLs, reading local files

> A remote server can redirect Streamlink to local file URLs, allowing attackers to read local files and leak their contents into stream output.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N`)
- **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:** Yes
- **Published:** 23 Sep 2026
- **Updated:** 29 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-92164, GHSA-vf2x-4v53-pm7v, PYSEC-2026-4172, UBUNTU-CVE-2026-92164

## What is CVE-2026-92164?

CVE-2026-92164 is a medium-severity path traversal vulnerability in streamlink, published on 23 Sep 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

Streamlink is a CLI utility which pipes video streams from various services into a video player. Prior to 8.6.0, HTTPSession mounts a FileAdapter for the file scheme and inherits redirect handling from requests.Session without rejecting cross-protocol redirects. A remote server controlling an HTTP or HTTPS URL reached by Streamlink can return a redirect to a local file URL, causing HTTPSession to read the local file and return its contents to the response consumer. This bypasses the direct file URL checks added for HLS and DASH content because the manifest contains an ordinary network URL and the scheme transition occurs later during fetch handling. The flaw applies to every request made through HTTPSession, and a segment fetch can place the local file contents into stream output. This issue is fixed in version 8.6.0.

Weakness: CWE-73 (External Control of File Name or Path)

## Which versions are affected by CVE-2026-92164?

3 open source packages ship an affected version, including streamlink.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `streamlink` | PyPI | All versions | 8.6.0 |
| `streamlink` | PyPI | All versions | 8.6.0 |
| `streamlink` | PyPI | All versions | 8.6.0 |

## How do I fix CVE-2026-92164?

Upgrade streamlink to 8.6.0 or later.

## Is CVE-2026-92164 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92164 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-92164 and fix it if it is affected.

What it is: CVE-2026-92164 is a medium-severity path traversal vulnerability in streamlink, published on 23 Sep 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-2026-92164 exists.

Affected packages and fixed versions:
- streamlink (PyPI): affected all versions; fixed in 8.6.0
- streamlink (PyPI): affected all versions; fixed in 8.6.0
- streamlink (PyPI): affected all versions; fixed in 8.6.0

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-2026-92164/ (Markdown: https://insights.sbomify.com/CVE-2026-92164/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-92164
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-92164
- OSV: https://osv.dev/vulnerability/CVE-2026-92164

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-92164/
Summaries are generated and may contain mistakes; the official description above is the record.