Vulnerability in @Fastify/aws-lambda
CVE-2026-18248
@fastify/aws-lambda version 6.4.0 decorates each Fastify request with request.awsLambda.event and request.awsLambda.context, values that applications are documented to use for authorization decisions such as reading API Gateway authorizer…
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- @Fastify/aws-lambda — versions 6.4.0, 6.4.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-18248?
- CVE-2026-18248 is a critical-severity vulnerability in @Fastify/aws-lambda, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2026-08-03.
- How severe is CVE-2026-18248?
- Critical severity. CVSS v3 base score is 9.1 out of 10.