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CVE-2026-84994GHSA-X586-XVC8-G7Q6

Qwik: Crashing any Qwik Server via Resource thenable

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 2.0.0-beta37, 1.20.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

Qwik is a performance-focused JavaScript framework. Prior to @builder.io/qwik 1.20.0 and @qwik.dev/core 2.0.0-beta.37, default server-side qwik-json deserialization causes ResourceSerializer.$fill$ to pass resource._resolved to Promise.resolve without first rejecting attacker-controlled thenables. An unauthenticated request can provide a plain object whose then property is a QRL for an unregistered symbol, causing an orphaned asynchronous rejection that terminates Node.js under its default unhandled-rejection policy. A single request can crash a server, and repeated requests can keep replicas unavailable. This issue is fixed in @builder.io/qwik 1.20.0 and @qwik.dev/core 2.0.0-beta.37.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • QwikDev qwik

    fixed in 2.0.0-beta37

  • @builder.io qwik

    fixed in 1.20.0

  • @builder.io/qwiknpm

    fixed in 1.20.0

  • @qwik.dev/corenpm

    fixed in 2.0.0-beta37

References 4

GitHub · QwikDev/qwik