# HTTP Request Smuggling in Netty

Advisory record · `GHSA-ff2w-cq2g-wv5f`

- **Identifiers:** `GHSA-ff2w-cq2g-wv5f` · `CVE-2020-7238`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **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:** 21 Feb 2020
- **Updated:** 14 Mar 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 21 Feb 2020, 18:55 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `io.netty:netty-handler` (Maven): affected `>=4.1.43, <4.1.45`; fixed in `4.1.45`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.036, the 89th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:13 UTC: First seen by agentprime
- 31 Oct 2026, 15:13 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-ff2w-cq2g-wv5f)

## Sources

- [GitHub Advisory Database: GHSA-ff2w-cq2g-wv5f](https://github.com/advisories/GHSA-ff2w-cq2g-wv5f)
- [OSV: GHSA-ff2w-cq2g-wv5f](https://osv.dev/vulnerability/GHSA-ff2w-cq2g-wv5f)
- <https://nvd.nist.gov/vuln/detail/CVE-2020-7238>
- <https://github.com/jdordonezn/CVE-2020-72381/issues/1>
- <https://github.com/netty/netty/issues/9861>
- <https://github.com/netty/netty/pull/9865>
- <https://www.debian.org/security/2021/dsa-4885>
- <https://netty.io/news>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TS6VX7OMXPDJIU5LRGUAHRK6MENAVJ46>
- <https://lists.debian.org/debian-lts-announce/2020/09/msg00003.html>
- <https://lists.debian.org/debian-lts-announce/2020/02/msg00018.html>
- <https://lists.debian.org/debian-lts-announce/2020/02/msg00017.html>
- <https://lists.apache.org/thread.html/rc8d554aad889d12b140d9fd7d2d6fc2e8716e9792f6f4e4b2cdc2d05@%3Ccommits.cassandra.apache.org%3E>
- <https://lists.apache.org/thread.html/r131e572d003914843552fa45c4398b9903fb74144986e8b107c0a3a7@%3Ccommits.cassandra.apache.org%3E>

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-ff2w-cq2g-wv5f>, 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-ff2w-cq2g-wv5f/>. Everything for agents: <https://agentprime.io/llms.txt>.