CVE-2024-43800: serve-static affected by template injection that can lead to XSS

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-10 · updated 2026-06-17
Weakness: CWE-79

Description

serve-static serves static files. serve-static passes untrusted user input - even after sanitizing it - to redirect() may execute untrusted code. This issue is patched in serve-static 1.16.0.

Affected products

expressjs serve-static: before 1.16.0; from 2.0.0 before 2.1.0 — fixed in 1.16.0, 2.1.0
Npm Serve-Static: before 1.16.0; from 2.0.0 before 2.1.0 — fixed in 1.16.0, 2.1.0

How to fix

Upgrade to a fixed version: expressjs serve-static 1.16.0, 2.1.0; Npm Serve-Static 1.16.0, 2.1.0. Check the vendor advisory for mitigations.

References

https://github.com/expressjs/serve-static/commit/0c11fad159898cdc69fd9ab63269b72468ecaf6b
https://github.com/expressjs/serve-static/commit/ce730896fddce1588111d9ef6fdf20896de5c6fa
https://github.com/expressjs/serve-static/security/advisories/GHSA-cm22-4g7w-348p

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