CVE-2026-27971

CRITICAL
2026-03-03 [email protected] GHSA-p9x5-jp3h-96mm
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Patch Released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 22:05 vuln.today
PoC Detected
Mar 05, 2026 - 17:57 vuln.today
Public exploit code
CVE Published
Mar 03, 2026 - 23:15 nvd
CRITICAL 9.8

Tags

RCE Deserialization Qwik

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.

Analysis

RCE in Qwik JavaScript framework <= 1.19.0 via unsafe deserialization in server$ Runtime. EPSS 13.4% with PoC available.

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Remediation

Within 24 hours: Inventory all Qwik deployments and their versions; isolate affected systems from production if possible and implement emergency WAF rules to block server$ RPC calls. Within 7 days: Upgrade to Qwik 1.19.1 or later once available, or migrate to an alternative framework if no patch timeline is provided. …

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Priority Score

82
Low Medium High Critical
KEV: 0
EPSS: +13.4
CVSS: +49
POC: +20

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CVE-2026-27971 vulnerability details – vuln.today
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