# Rubyzip gem contains a Directory Traversal vulnerability in zip file component

Advisory record · `GHSA-vqcq-mrmw-mcmg`

- **Identifiers:** `GHSA-vqcq-mrmw-mcmg` · `CVE-2018-1000544`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-59](https://cwe.mitre.org/data/definitions/59.html) · [CWE-434](https://cwe.mitre.org/data/definitions/434.html)
- **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md) · [Unrestricted file upload](https://agentprime.io/advisories/tag/file-upload.md)
- **Published:** 6 Sept 2018
- **Updated:** 16 Feb 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 6 Sept 2018, 03:27 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

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

## Affected packages

- `rubyzip` (RubyGems): affected `<1.2.2`; fixed in `1.2.2`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.043, the 91st percentile, on 10 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 6 Sept 2018. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-vqcq-mrmw-mcmg](https://github.com/advisories/GHSA-vqcq-mrmw-mcmg)
- [OSV: GHSA-vqcq-mrmw-mcmg](https://osv.dev/vulnerability/GHSA-vqcq-mrmw-mcmg)
- <https://nvd.nist.gov/vuln/detail/CVE-2018-1000544>
- <https://github.com/rubyzip/rubyzip/issues/369>
- <https://access.redhat.com/errata/RHSA-2018:3466>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rubyzip/CVE-2018-1000544.yml>
- <https://github.com/rubyzip/rubyzip>
- <https://lists.debian.org/debian-lts-announce/2018/08/msg00013.html>
- <https://lists.debian.org/debian-lts-announce/2020/08/msg00002.html>

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-vqcq-mrmw-mcmg>, 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-vqcq-mrmw-mcmg/>. Everything for agents: <https://agentprime.io/llms.txt>.