MEDIUMnpm →
fastify vulnerable to schema validation bypass via root primitive coercion mismatch
fastify vulnerable to schema validation bypass via root primitive coercion mismatch
Affected packages
- fastify
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- 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
Structured record: https://osv.dev/vulnerability/GHSA-w2qp-rph6-63g4
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→
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