# RubyGems Path Traversal vulnerability Advisory record · `GHSA-8qxg-mff5-j3wc` - **Identifiers:** `GHSA-8qxg-mff5-j3wc` · `CVE-2018-1000079` - **State:** Confirmed - **Severity:** CVSS 5.5 Medium - **Critical:** No - **Weakness (CWE):** [CWE-22](https://cwe.mitre.org/data/definitions/22.html) - **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md) - **Published:** 14 May 2022 - **Updated:** 12 Mar 2024 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 14 May 2022, 01:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Affected packages - `rubygems-update` (RubyGems): affected `<2.7.6`; fixed in `2.7.6` - `org.jruby:jruby-stdlib` (Maven): affected `<9.1.16.0`; fixed in `9.1.16.0` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > Two packages are affected: RubyGems rubygems-update before 2.7.6, and Maven org.jruby:jruby-stdlib before 9.1.16.0. The source describes a directory traversal flaw in gem installation that lets a malicious gem write files to arbitrary locations on the filesystem during installation. An attacker would need a user to install a crafted gem. Upgrade rubygems-update to 2.7.6 or later, and jruby-stdlib to 9.1.16.0 or later. Written 8 Nov 2026. ## 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 - 5.5 Medium, CVSS 3.0: `CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N`, from GitHub Advisory Database - **CISA KEV:** Not listed. - **EPSS:** 0.028, the 86th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 31 Oct 2026, 15:13 UTC: First seen by agentprime - 31 Oct 2026, 15:13 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-8qxg-mff5-j3wc) ## Sources - [GitHub Advisory Database: GHSA-8qxg-mff5-j3wc](https://github.com/advisories/GHSA-8qxg-mff5-j3wc) - [OSV: GHSA-8qxg-mff5-j3wc](https://osv.dev/vulnerability/GHSA-8qxg-mff5-j3wc) - - - - - - - - - - - - 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 (), 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: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .