AIKIDO-2026-455718
workerd is vulnerable to Improper Input Validation
55
Medium Risk
This Affects:
workerdTL;DR
This version applies multiple security fixes in workerd: it prevents prototype-pollution-driven process aborts during structuredClone/deserialization, fixes several Use-after-free code pattern, avoids GC/finalizer crashes that could lead to std::terminate, adds strict limits to crypto operations to reduce resource-exhaustion DoS, hardens X509 string conversion, and prevents TLS checkServerIdentity from being silently ignored (it now throws ERR_OPTION_NOT_IMPLEMENTED when unsupported).
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
workerd is vulnerable to Improper Input Validation in versions 0.0.1 - 1.20260618.1.
How to fix this
Upgrade the workerd library to the patch version.
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SOC 2Compliant
ISO 27001Compliant