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Advisory record · GHSA-x586-xvc8-g7q6

Qwik: Crashing any Qwik Server via Resource thenable

CVSS 8.7 HighEPSS 0.0052 · 44th percentile

Published by the GitHub Advisory Database at 15 Oct 2026, 20:22 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
@builder.io/qwiknpm<1.20.01.20.0
@qwik.dev/corenpm<2.0.0-beta372.0.0-beta37
Identifiers
GHSA-x586-xvc8-g7q6 · CVE-2026-84994
Weakness (CWE)
CWE-248
Tags
Published
15 Oct 2026
Updated
15 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Qwik packages @builder.io/qwik before 1.20.0 and @qwik.dev/core before 2.0.0-beta37 are affected. An unauthenticated attacker can send a single HTTP request that crashes a Qwik server running in its default configuration, and repeated requests can keep every replica down. Upgrade @builder.io/qwik to 1.20.0 or @qwik.dev/core to 2.0.0-beta37.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0052, the 44th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.