# HTTP Request Smuggling in Netty

Advisory record · `GHSA-p2v9-g2qv-p635`

- **Identifiers:** `GHSA-p2v9-g2qv-p635` · `CVE-2019-20445`
- **State:** Confirmed
- **Severity:** No CVSS score
- **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:** 8 Nov 2023
- **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 `>=4.0.0, <4.1.45`; fixed in `4.1.45`
- `org.jboss.netty:netty` (Maven): affected `all versions`; no fixed version yet
- `io.netty:netty` (Maven): affected `all versions`; no fixed version yet

## 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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.14, the 96th percentile, on 7 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 21 Feb 2020. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-p2v9-g2qv-p635](https://github.com/advisories/GHSA-p2v9-g2qv-p635)
- [OSV: GHSA-p2v9-g2qv-p635](https://osv.dev/vulnerability/GHSA-p2v9-g2qv-p635)
- <https://nvd.nist.gov/vuln/detail/CVE-2019-20445>
- <https://github.com/netty/netty/issues/9861>
- <https://github.com/netty/netty/pull/9865>
- <https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26@%3Ccommits.pulsar.apache.org%3E>
- <https://lists.apache.org/thread.html/rce71d33747010d32d31d90f5d737dae26291d96552f513a266c92fbb@%3Cnotifications.zookeeper.apache.org%3E>
- <https://lists.apache.org/thread.html/rbdb59c683d666130906a9c05a1d2b034c4cc08cda7ed41322bd54fe2@%3Cissues.flume.apache.org%3E>
- <https://lists.apache.org/thread.html/rb84c57670ec48ef23f4d07973b7fa69f629b8e7fcfb48874362feb6f@%3Ccommits.zookeeper.apache.org%3E>
- <https://lists.apache.org/thread.html/rb5c065e7bd701b0744f9f28ad769943f91745102716c1eb516325f11@%3Cissues.spark.apache.org%3E>
- <https://lists.apache.org/thread.html/raaac04b7567c554786132144bea3dcb72568edd410c1e6f0101742e7@%3Cissues.flink.apache.org%3E>
- <https://lists.apache.org/thread.html/ra9fbfe7d4830ae675bf34c7c0f8c22fc8a4099f65706c1bc4f54c593@%3Cissues.zookeeper.apache.org%3E>
- <https://lists.apache.org/thread.html/ra2ace4bcb5cf487f72cbcbfa0f8cc08e755ec2b93d7e69f276148b08@%3Cissues.zookeeper.apache.org%3E>
- <https://lists.apache.org/thread.html/ra1a71b576a45426af5ee65255be9596ff3181a342f4ba73b800db78f@%3Cdev.geode.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-p2v9-g2qv-p635>, 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-p2v9-g2qv-p635/>. Everything for agents: <https://agentprime.io/llms.txt>.