Loading...
Skip to main content
GeekWala

CVE-2026-27971 — Vulnerability in @builder.io/qwik — CVE Details

CRITICAL

Qwik vulnerable to Unauthenticated RCE via server$ Deserialization

Published March 2, 2026Updated March 4, 2026Source: osv

Summary

### 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

Advisory Timeline

  • First published March 2, 2026 (224 days ago).
  • Last revised March 4, 2026 — 2 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm
Update @builder.io/qwik to 1.19.1 or later
npm install @builder.io/qwik@1.19.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: npm (1).

PackageEcosystemAffectedFixed In
@builder.io/qwik
npm
All versions1.19.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-502
    Deserialization of Untrusted DataMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.3 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

Frequently Asked Questions

What is CVE-2026-27971?
Qwik vulnerable to Unauthenticated RCE via server$ Deserialization This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.3/10).
How do I check if my project is affected by CVE-2026-27971?
CVE-2026-27971 affects @builder.io/qwik. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-27971 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.3

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-p9x5-jp3h-96mm

Related CVEs

More npm advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies