AIKIDO-2026-154037
encore.dev is vulnerable to Authentication Bypass
91
Critical Risk
This Affects:
encore.devTL;DR
Encore API endpoints that do not require authentication can still query whether a user authenticated. For those endpoints the authentication gateway ignores the inbound X-Encore-Meta-UserID header instead of stripping it, so a request can set that header and have upstream services treat it as a legitimate authenticated user, spoofing the user id. Endpoints that require authentication are handled correctly and are not affected. The fix strips all inbound x-encore-meta-* headers for requests that are not from a verified internal caller and re-derives the metadata before signing and forwarding it.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you expose API endpoints that do not require authentication but still read the authenticated user.
Background info
encore.dev is vulnerable to Authentication Bypass in versions 0.0.1 - 1.57.10.
How to fix this
Upgrade the encore.dev library to the patch version.
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SOC 2Compliant
ISO 27001Compliant