# Streamlink: HTTPSession follows HTTP redirects into file:// URLs, reading local files

Advisory record · `GHSA-vf2x-4v53-pm7v`

- **Identifiers:** `GHSA-vf2x-4v53-pm7v` · `CVE-2026-92164` · `PYSEC-2026-4172`
- **State:** Confirmed
- **Severity:** CVSS 6.5 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-73](https://cwe.mitre.org/data/definitions/73.html)
- **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md)
- **Published:** 24 Sept 2026
- **Updated:** 1 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 24 Sept 2026, 14:58 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `streamlink` (PyPI): affected `<8.6.0`; fixed in `8.6.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Streamlink versions before 8.6.0 are vulnerable. HTTPSession follows HTTP redirects into file:// URLs, so a remote server can redirect a request Streamlink makes to a local file, and the file's contents are returned as the response body. An attacker needs only to control an http(s) URL that the victim's Streamlink run reaches, such as a playlist or manifest URL, and can then read local files on the victim's host. Upgrade to Streamlink 8.6.0 or later.

Written 1 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 6.5 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0035, the 28th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:09 UTC: First seen by agentprime
- 31 Oct 2026, 14:09 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-vf2x-4v53-pm7v)

## Sources

- [GitHub Advisory Database: GHSA-vf2x-4v53-pm7v](https://github.com/advisories/GHSA-vf2x-4v53-pm7v)
- [OSV: GHSA-vf2x-4v53-pm7v](https://osv.dev/vulnerability/GHSA-vf2x-4v53-pm7v)
- <https://github.com/streamlink/streamlink/security/advisories/GHSA-vf2x-4v53-pm7v>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-92164>
- <https://github.com/streamlink/streamlink/commit/4b99c64dde21ea70c24d9ffdbd15849b05f465c6>
- <https://github.com/streamlink/streamlink>
- <https://github.com/streamlink/streamlink/releases/tag/8.6.0>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-vf2x-4v53-pm7v>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-vf2x-4v53-pm7v/>. Everything for agents: <https://agentprime.io/llms.txt>.