CVE-2026-18504
1 advisory.
npm/fastify CVE-2026-18504: medium 5.4, EPSS 0.31%
fastify vulnerable to schema validation bypass via root primitive coercion mismatch
Action: Upgrade fastify to 5.12.1 or later.
npm i fastify@5.12.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 5.12.1 | - |
Fixed versions
| 5.12.1 |
Sources
- osv: GHSA-w2qp-rph6-63g4
- https://github.com/fastify/fastify/security/advisories/GHSA-w2qp-rph6-63g4
- https://nvd.nist.gov/vuln/detail/CVE-2026-18504
- https://github.com/fastify/fastify/commit/1ef8a60c87e94f42f666aa15ad68957772a83655
- https://cna.openjsf.org/security-advisories.html
- https://github.com/fastify/fastify
- https://github.com/fastify/fastify/releases/tag/v5.12.1
CVE-2026-18504 · published · modified · JSON