Qwik vulnerable to Unauthenticated RCE via server$ Deserialization
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
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @builder.io/qwik | < 1.19.1 | 1.19.1 |
References
- CVSS vector
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- Weakness (CWE)
CWE-502- Platform
- npm
- Package
@builder.io/qwik- Disclosed
- 02.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-p9x5-jp3h-96mm - CC BY 4.0
Vulnerability history: @builder.io/qwik
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 01.2023 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- High 1
- Medium 2
Disclosures per year
- 2023: 2
- 2024: 1
- 2025: 0
- 2026: 2
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Qwik vulnerable to Unauthenticated RCE via server$ Deserialization this entry
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