CVE-2026-33808
1 advisory.
npm/@fastify/express CVE-2026-33808: critical 9.1
@fastify/express has a middleware authentication bypass via URL normalization gaps (duplicate slashes and semicolons)
Action: Upgrade @fastify/express to 4.0.5 or later.
npm i @fastify/express@4.0.5Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 4.0.5 | - |
Fixed versions
| 4.0.5 |
Sources
- osv: GHSA-6hw5-45gm-fj88
- https://github.com/fastify/fastify-express/security/advisories/GHSA-6hw5-45gm-fj88
- https://nvd.nist.gov/vuln/detail/CVE-2026-33808
- https://cna.openjsf.org/security-advisories.html
- https://github.com/fastify/fastify-express
CVE-2026-33808 · published · modified · JSON