CVE-2026-27971 is a critical remote code execution (RCE) vulnerability affecting Qwik framework versions up to 1.19.0. This flaw stems from an unsafe deserialization vulnerability within the server$ RPC mechanism, allowing unauthenticated attackers to execute arbitrary code on the server with a single HTTP request, provided require() is available at runtime. With a CVSS score of 9.8 (Critical), the vulnerability is easily exploitable over the network with low attack complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While not currently listed in CISA's KEV catalog, recent community discussion indicates the existence of exploit code, specifically mentioning Nuclei, suggesting a heightened risk of exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.19.1CPE matchmatch criteria | cpe:2.3:a:qwik:qwik:*:*:*:*:*:node.js:*:* |
CVSS version used by this source: 4.0
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:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.