# Buffer not correctly recycled in Gzip Request inflation

Advisory record · `GHSA-86wm-rrjm-8wh8`

- **Identifiers:** `GHSA-86wm-rrjm-8wh8` · `BIT-kafka-2020-27218` · `BIT-spark-2020-27218` · `CVE-2020-27218`
- **State:** Confirmed
- **Severity:** CVSS 4.8 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-226](https://cwe.mitre.org/data/definitions/226.html)
- **Tags:** [CWE-226](https://agentprime.io/advisories/tag/cwe-226.md)
- **Published:** 2 Dec 2020
- **Updated:** 8 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 2 Dec 2020, 18:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.eclipse.jetty:jetty-server` (Maven): affected `>=9.4.0, <9.4.35.v20201120`; fixed in `9.4.35.v20201120`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.083, the 94th percentile, on 5 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-86wm-rrjm-8wh8)

## Sources

- [GitHub Advisory Database: GHSA-86wm-rrjm-8wh8](https://github.com/advisories/GHSA-86wm-rrjm-8wh8)
- [OSV: GHSA-86wm-rrjm-8wh8](https://osv.dev/vulnerability/GHSA-86wm-rrjm-8wh8)
- <https://github.com/eclipse/jetty.project/security/advisories/GHSA-86wm-rrjm-8wh8>
- <https://nvd.nist.gov/vuln/detail/CVE-2020-27218>
- <https://lists.apache.org/thread.html/rbbd003149f929b0e2fe58fb315de1658e98377225632e7e4239323fb@%3Ccommits.kafka.apache.org%3E>
- <https://lists.apache.org/thread.html/rbbd003149f929b0e2fe58fb315de1658e98377225632e7e4239323fb%40%3Ccommits.kafka.apache.org%3E>
- <https://lists.apache.org/thread.html/rba4bca48d2cdfa8c08afc368a9cc4572ec85a5915ba29b8a194bf505@%3Creviews.spark.apache.org%3E>
- <https://lists.apache.org/thread.html/rba4bca48d2cdfa8c08afc368a9cc4572ec85a5915ba29b8a194bf505%40%3Creviews.spark.apache.org%3E>
- <https://lists.apache.org/thread.html/rb8f413dc923070919b09db3ac87d079a2dcc6f0adfbb029e206a7930@%3Cnotifications.zookeeper.apache.org%3E>
- <https://lists.apache.org/thread.html/rb8f413dc923070919b09db3ac87d079a2dcc6f0adfbb029e206a7930%40%3Cnotifications.zookeeper.apache.org%3E>
- <https://lists.apache.org/thread.html/rb6a3866c02ac4446451c7d9dceab2373b6d32fb058f9085c6143de30@%3Creviews.spark.apache.org%3E>
- <https://lists.apache.org/thread.html/rb6a3866c02ac4446451c7d9dceab2373b6d32fb058f9085c6143de30%40%3Creviews.spark.apache.org%3E>
- <https://lists.apache.org/thread.html/rb4ca79d1af5237108ce8770b7c46ca78095f62ef21331d9d06142388@%3Cjira.kafka.apache.org%3E>
- <https://lists.apache.org/thread.html/rb4ca79d1af5237108ce8770b7c46ca78095f62ef21331d9d06142388%40%3Cjira.kafka.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-86wm-rrjm-8wh8>, 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-86wm-rrjm-8wh8/>. Everything for agents: <https://agentprime.io/llms.txt>.