# HTTP Request Smuggling in Twisted

Advisory record · `GHSA-p5xh-vx83-mxcj`

- **Identifiers:** `GHSA-p5xh-vx83-mxcj` · `CVE-2020-10109` · `PYSEC-2020-260`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-444](https://cwe.mitre.org/data/definitions/444.html)
- **Tags:** [HTTP request smuggling](https://agentprime.io/advisories/tag/request-smuggling.md)
- **Published:** 31 Mar 2020
- **Updated:** 25 Nov 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 31 Mar 2020, 15:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `twisted` (PyPI): affected `<20.3.0`; fixed in `20.3.0`

## 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

- 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.033, the 88th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 31 Mar 2020. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-p5xh-vx83-mxcj](https://github.com/advisories/GHSA-p5xh-vx83-mxcj)
- [OSV: GHSA-p5xh-vx83-mxcj](https://osv.dev/vulnerability/GHSA-p5xh-vx83-mxcj)
- <https://nvd.nist.gov/vuln/detail/CVE-2020-10109>
- <https://github.com/twisted/twisted/commit/4a7d22e490bb8ff836892cc99a1f54b85ccb0281>
- <https://github.com/advisories/GHSA-p5xh-vx83-mxcj>
- <https://github.com/pypa/advisory-database/tree/main/vulns/twisted/PYSEC-2020-260.yaml>
- <https://github.com/twisted/twisted>
- <https://github.com/twisted/twisted/blob/6ff2c40e42416c83203422ff70dfc49d2681c8e2/NEWS.rst#twisted-2030-2020-03-13>
- <https://know.bishopfox.com/advisories>
- <https://know.bishopfox.com/advisories/twisted-version-19.10.0>
- <https://lists.debian.org/debian-lts-announce/2022/02/msg00021.html>
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL>
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3NIL7VXSGJND2Q4BSXM3CFTAFU6T7D>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL>

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-p5xh-vx83-mxcj>, 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-p5xh-vx83-mxcj/>. Everything for agents: <https://agentprime.io/llms.txt>.