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Vulnerability record · CVE-2026-27971 · published 3 March 2026

CVE-2026-27971: Qwik deserialization of untrusted data vulnerability

Qwik · Qwik

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.

9.2 CVSS 4.0 Critical EPSS 2.9% · top 13.7% CWE-502 · Deserialization of untrusted data
9.2CVSS 4.0 base score
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-25150Qwik prototype pollution vulnerabilityQwik is a performance focused javascript framework. Prior to version 1.19.0, a prototype pollution vulnerability exists in the formToObj() function w…EPSS 0.66%9.8CVE-2023-1283Qwik code injection vulnerabilityCode Injection in GitHub repository builderio/qwik prior to 0.21.0.EPSS 1.1%7.5CVE-2026-32701Qwik type confusion vulnerabilityQwik is a performance-focused JavaScript framework. Versions prior to 1.19.2 improperly inferred arrays from dotted form field names during FormData …EPSS 0.53%7.1CVE-2026-25155Qwik cross-site request forgery vulnerabilityQwik is a performance focused javascript framework. Prior to version 1.12.0, a typo in the regular expression within isContentType causes incorrect p…EPSS 0.14%6.5CVE-2023-2307Qwik cross-site request forgery vulnerabilityCross-Site Request Forgery (CSRF) in GitHub repository builderio/qwik prior to 0.104.0.EPSS 0.27%6.1CVE-2024-41677Qwik cross-site scripting vulnerabilityQwik is a performance focused javascript framework. A potential mutation XSS vulnerability exists in Qwik for versions up to but not including 1.6.0.…EPSS 0.50%6.1CVE-2023-0410Qwik cross-site scripting vulnerabilityCross-site Scripting (XSS) - Generic in GitHub repository builderio/qwik prior to 0.1.0-beta5.EPSS 0.46%5.9CVE-2026-25151Qwik cross-site request forgery vulnerabilityQwik is a performance focused javascript framework. Prior to version 1.19.0, Qwik City’s server-side request handler inconsistently interprets HTTP r…EPSS 0.17%

Source: NIST National Vulnerability Database (record CVE-2026-27971), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.