# Express.js Open Redirect in malformed URLs

Advisory record · `GHSA-rv95-896h-c2vc`

- **Identifiers:** `GHSA-rv95-896h-c2vc` · `CVE-2024-29041`
- **State:** Confirmed
- **Severity:** CVSS 6.1 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-601](https://cwe.mitre.org/data/definitions/601.html) · [CWE-1286](https://cwe.mitre.org/data/definitions/1286.html)
- **Tags:** [Open redirect](https://agentprime.io/advisories/tag/open-redirect.md) · [CWE-1286](https://agentprime.io/advisories/tag/cwe-1286.md)
- **Published:** 25 Mar 2024
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 25 Mar 2024, 19:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `express` (npm): affected `<4.19.2 || >=5.0.0-alpha.1, <5.0.0-beta.3`; fixed in `4.19.2`, `5.0.0-beta.3`

## 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

- 6.1 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0079, the 56th 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 25 Mar 2024. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-rv95-896h-c2vc](https://github.com/advisories/GHSA-rv95-896h-c2vc)
- [OSV: GHSA-rv95-896h-c2vc](https://osv.dev/vulnerability/GHSA-rv95-896h-c2vc)
- <https://github.com/expressjs/express/security/advisories/GHSA-rv95-896h-c2vc>
- <https://nvd.nist.gov/vuln/detail/CVE-2024-29041>
- <https://github.com/koajs/koa/issues/1800>
- <https://github.com/expressjs/express/pull/5539>
- <https://github.com/expressjs/express/commit/0867302ddbde0e9463d0564fea5861feb708c2dd>
- <https://github.com/expressjs/express/commit/0b746953c4bd8e377123527db11f9cd866e39f94>
- <https://expressjs.com/en/4x/api.html#res.location>
- <https://github.com/expressjs/express>

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-rv95-896h-c2vc>, 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-rv95-896h-c2vc/>. Everything for agents: <https://agentprime.io/llms.txt>.