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    2 vulnerabilities found for @fastify/aws-lambda by @fastify/aws-lambda

    CVE-2026-18248 (GCVE-0-2026-18248)

    Vulnerability from nvd – Published: 2026-08-03 15:20 – Updated: 2026-08-03 19:35
    VLAI
    Title
    @fastify/aws-lambda vulnerable to Lambda event spoofing via client-controlled x-apigateway-event header
    Summary
    @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 claims. In the default configuration, the getter that populates this decoration reads the client-controlled x-apigateway-event and x-apigateway-context HTTP headers before falling back to the trusted internal request token, and those reserved headers are not stripped from the incoming event. An unauthenticated attacker who can set a single HTTP header can therefore forge the entire Lambda proxy event, including the authorizer context, and override the genuine one. This results in a full authentication and authorization bypass and privilege escalation for any application that trusts request.awsLambda.event for identity or access control. Only version 6.4.0 is affected. Patches: upgrade to @fastify/aws-lambda 6.4.1, which resolves the decoration only through the internal per-invocation token and strips the reserved headers before the request is processed.
    Severity
    9.1 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-345 - Insufficient Verification of Data Authenticity
    Assigner
    References
    Impacted products
    Vendor Product Version
    @fastify/aws-lambda @fastify/aws-lambda Affected: 6.4.0 , < 6.4.1 (semver)
    Unaffected: 6.4.1 (semver)
    		Create a notification for this product.
    Credits
    EQSTLab adrai UlisesGascon mcollina useworld
    Show details on NVD website
    To clipboard 

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    CVE-2026-18248 (GCVE-0-2026-18248)

    Vulnerability from cvelistv5 – Published: 2026-08-03 15:20 – Updated: 2026-08-03 19:35
    VLAI
    Title
    @fastify/aws-lambda vulnerable to Lambda event spoofing via client-controlled x-apigateway-event header
    Summary
    @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 claims. In the default configuration, the getter that populates this decoration reads the client-controlled x-apigateway-event and x-apigateway-context HTTP headers before falling back to the trusted internal request token, and those reserved headers are not stripped from the incoming event. An unauthenticated attacker who can set a single HTTP header can therefore forge the entire Lambda proxy event, including the authorizer context, and override the genuine one. This results in a full authentication and authorization bypass and privilege escalation for any application that trusts request.awsLambda.event for identity or access control. Only version 6.4.0 is affected. Patches: upgrade to @fastify/aws-lambda 6.4.1, which resolves the decoration only through the internal per-invocation token and strips the reserved headers before the request is processed.
    Severity
    9.1 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-345 - Insufficient Verification of Data Authenticity
    Assigner
    References
    Impacted products
    Vendor Product Version
    @fastify/aws-lambda @fastify/aws-lambda Affected: 6.4.0 , < 6.4.1 (semver)
    Unaffected: 6.4.1 (semver)
    		Create a notification for this product.
    Credits
    EQSTLab adrai UlisesGascon mcollina useworld
    Show details on NVD website
    To clipboard 

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