# Improper Handling of Length Parameter Inconsistency in Compress

Advisory record · `GHSA-mc84-pj99-q6hh`

- **Identifiers:** `GHSA-mc84-pj99-q6hh` · `CVE-2021-36090`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** Yes: CVSS 7+ and EPSS
- **Weakness (CWE):** [CWE-130](https://cwe.mitre.org/data/definitions/130.html)
- **Tags:** [CWE-130](https://agentprime.io/advisories/tag/cwe-130.md)
- **Published:** 2 Aug 2021
- **Updated:** 8 Mar 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 2 Aug 2021, 16:55 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 7.5 (7.0 or more) and EPSS 0.13 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

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

## Affected packages

- `org.apache.commons:commons-compress` (Maven): affected `<1.21`; fixed in `1.21`

## 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:N/A:H`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.13, the 96th percentile, on 5 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 2 Aug 2021. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-mc84-pj99-q6hh](https://github.com/advisories/GHSA-mc84-pj99-q6hh)
- [OSV: GHSA-mc84-pj99-q6hh](https://osv.dev/vulnerability/GHSA-mc84-pj99-q6hh)
- <https://nvd.nist.gov/vuln/detail/CVE-2021-36090>
- <https://commons.apache.org/proper/commons-compress/security-reports.html>
- <https://lists.apache.org/thread.html/rbbf42642c3e4167788a7c13763d192ee049604d099681f765385d99d@%3Cdev.drill.apache.org%3E>
- <https://lists.apache.org/thread.html/rbe91c512c5385181149ab087b6c909825d34299f5c491c6482a2ed57@%3Ccommits.druid.apache.org%3E>
- <https://lists.apache.org/thread.html/rc4134026d7d7b053d4f9f2205531122732405012c8804fd850a9b26f%40%3Cuser.commons.apache.org%3E>
- <https://lists.apache.org/thread.html/rc7df4c2f0bbe2028a1498a46d322c91184f7a369e3e4c57d9518cacf@%3Cdev.drill.apache.org%3E>
- <https://lists.apache.org/thread.html/rd4332baaf6debd03d60deb7ec93bee49e5fdbe958cb6800dff7fb00e@%3Cnotifications.skywalking.apache.org%3E>
- <https://lists.apache.org/thread.html/rdd5412a5b9a25aed2a02c3317052d38a97128314d50bc1ed36e81d38@%3Cuser.ant.apache.org%3E>
- <https://lists.apache.org/thread.html/rf2f4d7940371a7c7c5b679f50e28fc7fcc82cd00670ced87e013ac88@%3Ccommits.druid.apache.org%3E>
- <https://lists.apache.org/thread.html/rf3f0a09fee197168a813966c5816157f6c600a47313a0d6813148ea6@%3Cissues.drill.apache.org%3E>
- <https://lists.apache.org/thread.html/rf93b6bb267580e01deb7f3696f7eaca00a290c66189a658cf7230a1a@%3Cissues.drill.apache.org%3E>
- <https://lists.apache.org/thread.html/rfba19167efc785ad3561e7ef29f340d65ac8f0d897aed00e0731e742@%3Cnotifications.skywalking.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-mc84-pj99-q6hh>, 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-mc84-pj99-q6hh/>. Everything for agents: <https://agentprime.io/llms.txt>.