# HTTP Request Smuggling in Netty

Advisory record · `GHSA-p979-4mfw-53vg`

- **Identifiers:** `GHSA-p979-4mfw-53vg` · `CVE-2019-16869`
- **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:** 11 Oct 2019
- **Updated:** 29 Jun 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 11 Oct 2019, 18:41 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `io.netty:netty-all` (Maven): affected `>=4.0.0.Beta1, <4.1.42.Final`; fixed in `4.1.42.Final`
- `org.jboss.netty:netty` (Maven): affected `<=3.2.9.Final`; no fixed version yet
- `io.netty:netty` (Maven): affected `>=3.3.0.Final, <=4.0.0.Alpha8`; 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

- 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:** 0.086, the 95th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:20 UTC: First seen by agentprime
- 31 Oct 2026, 14:20 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-p979-4mfw-53vg)

## Sources

- [GitHub Advisory Database: GHSA-p979-4mfw-53vg](https://github.com/advisories/GHSA-p979-4mfw-53vg)
- [OSV: GHSA-p979-4mfw-53vg](https://osv.dev/vulnerability/GHSA-p979-4mfw-53vg)
- <https://nvd.nist.gov/vuln/detail/CVE-2019-16869>
- <https://github.com/netty/netty/issues/9571>
- <https://lists.apache.org/thread.html/raaac04b7567c554786132144bea3dcb72568edd410c1e6f0101742e7@%3Cissues.flink.apache.org%3E>
- <https://lists.apache.org/thread.html/r959474dcf7f88565ed89f6252ca5a274419006cb71348f14764b183d@%3Ccommits.cassandra.apache.org%3E>
- <https://lists.apache.org/thread.html/r90030b0117490caed526e57271bf4d7f9b012091ac5083c895d16543@%3Ccommon-issues.hadoop.apache.org%3E>
- <https://lists.apache.org/thread.html/r86befa74c5cd1482c711134104aec339bf7ae879f2c4437d7ec477d4@%3Ccommon-commits.hadoop.apache.org%3E>
- <https://lists.apache.org/thread.html/r8402d67fdfe9cf169f859d52a7670b28a08eff31e54b522cc1432532@%3Ccommon-issues.hadoop.apache.org%3E>
- <https://lists.apache.org/thread.html/r832724df393a7ef25ca4c7c2eb83ad2d6c21c74569acda5233f9f1ec@%3Ccommits.pulsar.apache.org%3E>
- <https://lists.apache.org/thread.html/r831e0548fad736a98140d0b3b7dc575af0c50faea0b266434ba813cc@%3Cdev.rocketmq.apache.org%3E>
- <https://lists.apache.org/thread.html/r7790b9d99696d9eddce8a8c96f13bb68460984294ea6fea3800143e4@%3Ccommits.pulsar.apache.org%3E>
- <https://lists.apache.org/thread.html/r73c400ab66d79821dec9e3472f0e2c048d528672bdb0f8bf44d7cb1f@%3Ccommits.cassandra.apache.org%3E>
- <https://lists.apache.org/thread.html/r4d3f1d3e333d9c2b2f6e6ae8ed8750d4de03410ac294bcd12c7eefa3@%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-p979-4mfw-53vg>, 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-p979-4mfw-53vg/>. Everything for agents: <https://agentprime.io/llms.txt>.