CVE-2026-27971 PUBLISHED

Qwik affected by unauthenticated RCE via server$ Deserialization

Assigner: GitHub_M
Reserved: 25.02.2026 Published: 03.03.2026 Updated: 03.03.2026

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.

Metrics

CVSS 4.0

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
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	QwikDev
Product	qwik
Versions	Version < 1.19.1 is affected

References

https://github.com/QwikDev/qwik/security/advisories/GHSA-p9x5-jp3h-96mm

Problem Types

CWE-502: Deserialization of Untrusted Data CWE