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GHSA-p9x5-jp3h-96mm

Qwik vulnerable to Unauthenticated RCE via server$ Deserialization

Source: GitHub Advisory Database (reviewed) Critical CVE-2026-27971

Packages

EcosystemPackageAffectedFixed in
npm @builder.io/qwik < 1.19.1 1.19.1

Details

As written in the advisory (Markdown source, shown as plain text).

### Summary qwik <=1.19.0 is vulnerable to RCE due to an unsafe deserialization vulnerability in the `server$` RPC mechanism that allows any unauthenticated user to execute arbitrary code on the server with a single HTTP request. Affects any deployment where `require()` is available at runtime. ### Impact - Remote Code Execution

References

External links from the advisory. They lead to third-party sites.