CVE-2026-27971
Critical
Description
Qwik is a performance focused javascript framework. 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. This vulnerability is fixed in 1.19.1.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Qwik
PublishedMar 3, 2026
First seenMar 3, 2026
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Update
- qwik qwik1.19.1 or later
- @builder.io/qwik1.19.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| qwik qwik | v < 1.19.1 | 1.19.1 |
| @builder.io/qwiknpm | v < 1.19.1 | 1.19.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.