# Local Temp Directory Hijacking Vulnerability

Advisory record · `GHSA-g3wg-6mcf-8jj6`

- **Identifiers:** `GHSA-g3wg-6mcf-8jj6` · `CVE-2020-27216`
- **State:** Confirmed
- **Severity:** CVSS 7.0 High
- **Critical:** No
- **Weakness (CWE):** [CWE-378](https://cwe.mitre.org/data/definitions/378.html) · [CWE-379](https://cwe.mitre.org/data/definitions/379.html) · [CWE-552](https://cwe.mitre.org/data/definitions/552.html)
- **Tags:** [Information disclosure](https://agentprime.io/advisories/tag/info-disclosure.md) · [CWE-378](https://agentprime.io/advisories/tag/cwe-378.md) · [CWE-379](https://agentprime.io/advisories/tag/cwe-379.md)
- **Published:** 4 Nov 2020
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 4 Nov 2020, 17:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.eclipse.jetty:jetty-webapp` (Maven): affected `<9.4.33.v20201020 || >=10.0.0.beta1, <10.0.0.beta3 || >=11.0.0.beta1, <11.0.0.beta3`; fixed in `9.4.33.v20201020`, `10.0.0.beta3`, `11.0.0.beta3`
- `org.mortbay.jetty:jetty-webapp` (Maven): affected `<9.4.33 || >=10.0.0.beta1, <10.0.0.beta3 || >=11.0.0.beta1, <11.0.0.beta3`; fixed in `9.4.33`, `10.0.0.beta3`, `11.0.0.beta3`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.044, the 91st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:18 UTC: First seen by agentprime
- 31 Oct 2026, 14:18 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-g3wg-6mcf-8jj6)

## Sources

- [GitHub Advisory Database: GHSA-g3wg-6mcf-8jj6](https://github.com/advisories/GHSA-g3wg-6mcf-8jj6)
- [OSV: GHSA-g3wg-6mcf-8jj6](https://osv.dev/vulnerability/GHSA-g3wg-6mcf-8jj6)
- <https://github.com/eclipse/jetty.project/security/advisories/GHSA-g3wg-6mcf-8jj6>
- <https://github.com/eclipse/jetty.project/security/advisories/GHSA-g3wg-6mcf-8jj6#advisory-comment-63053>
- <https://nvd.nist.gov/vuln/detail/CVE-2020-27216>
- <https://github.com/eclipse/jetty.project/issues/5451>
- <https://github.com/github/codeql/pull/4473>
- <https://lists.apache.org/thread.html/raa9c370ab42d737e93bc1795bb6a2187d7c60210cd5e3b3ce8f3c484@%3Cissues.beam.apache.org%3E>
- <https://lists.apache.org/thread.html/rad255c736fad46135f1339408cb0147d0671e45c376c3be85ceeec1a@%3Cnotifications.zookeeper.apache.org%3E>
- <https://lists.apache.org/thread.html/rae15d73cabef55bad148e4e6449b05da95646a2a8db3fc938e858dff@%3Cissues.beam.apache.org%3E>
- <https://lists.apache.org/thread.html/raf9c581b793c30ff8f55f2415c7bd337eb69775aae607bf9ed1b16fb@%3Cdev.zookeeper.apache.org%3E>
- <https://lists.apache.org/thread.html/rafb023a7c61180a1027819678eb2068b0b60cd5c2559cb8490e26c81@%3Cissues.zookeeper.apache.org%3E>
- <https://lists.apache.org/thread.html/rb077d35f2940191daeefca0d6449cddb2e9d06bcf8f5af4da2df3ca2@%3Cissues.beam.apache.org%3E>
- <https://lists.apache.org/thread.html/rb5f2558ea2ac63633dfb04db1e8a6ea6bb1a2b8614899095e16c6233@%3Cissues.beam.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-g3wg-6mcf-8jj6>, 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-g3wg-6mcf-8jj6/>. Everything for agents: <https://agentprime.io/llms.txt>.