CVE-2024-43796: Express.js minimalist web framework for node

Q: How urgent is CVE-2024-43796?

Priority 28/100. No elevated risk signals yet.

Routine

MEDIUM 5.0UPGRADE

CVE-2024-43796 is a medium-severity flaw (CVSS 5.0) affecting express. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-09-10
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: openjsf

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-09-10 15:15 UTCPublished CVE record published
2026-06-17 07:51 UTCUpdated Record last modified

openjsf express UPGRADE

Affected: < 4.20.0 · 5.0.0 alpha1 · 5.0.0 alpha2 · 5.0.0 alpha3 · 5.0.0 alpha4 · 5.0.0 alpha5 · 5.0.0 alpha6 · 5.0.0 alpha7

Fixed in: 4.20.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls express

2. UPGRADE to 4.20.0

npm install express@">=4.20.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-43796?

express: upgrade to 4.20.0. Exact commands for each OS are on this page.

Is CVE-2024-43796 being exploited?

CVE-2024-43796 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-43796 affect?

CVE-2024-43796 affects express. Severity is medium (CVSS 5.0). 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.

How urgent is CVE-2024-43796?

Priority 28/100. No elevated risk signals yet.

Software pages

Express.js vulnerabilities

Related CVEs

CVE-2024-10491 MEDIUM 4.0 UPGRADE A vulnerability has been identified in the Express response.links function, allowing for arbitrary resource in

References

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