CVE-2024-43796 express vulnerable to XSS via response.redirect()
Medium 5.0
Published
Updated
Check this codebase for CVE-2024-43796 and fix it if it is affected.
What it is: CVE-2024-43796 is a medium-severity vulnerability in expressjs express, published on 10 Sep 2024.
Exploitation: There is no known exploitation of CVE-2024-43796 in the wild and no public exploit code.
Affected packages and fixed versions:
- express (npm): affected all versions; fixed in 4.20.0
- express (npm): affected all versions; fixed in 4.20.0
- express (npm): affected from 5.0.0-alpha.1; fixed in 5.0.0
- express (npm): affected from 5.0.0-alpha.1; fixed in 5.0.0
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2024-43796/ (Markdown: https://insights.sbomify.com/CVE-2024-43796/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2024-43796?
CVE-2024-43796 is a medium-severity vulnerability in expressjs express, published on 10 Sep 2024.
Official description
Express.js minimalist web framework for node. In express < 4.20.0, passing untrusted user input - even after sanitizing it - to response.redirect() may execute untrusted code. This issue is patched in express 4.20.0.
Weakness: CWE-79
Which versions are affected by CVE-2024-43796?
4 open source packages ship an affected version, including express. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
express npm | All versions | 4.20.0 |
express npm | All versions | 4.20.0 |
express npm | From 5.0.0-alpha.1 | 5.0.0 |
express npm | From 5.0.0-alpha.1 | 5.0.0 |
Products include Openjsf Express.
How do I fix CVE-2024-43796?
Upgrade express to a fixed version for your release line: 4.20.0 or 5.0.0.
Is CVE-2024-43796 being exploited?
There is no known exploitation of CVE-2024-43796 in the wild and no public exploit code.
Other vulnerabilities in expressjs express
Sources
Also known as AZL-49053, AZL-49091, AZL-49135, AZL-49152, CLSA-2026-1781484857, CLSA-2026-1792491907 and 5 more.