CVE-2026-27971Public exploitNetwork attack vector

Unauthenticated RCE via dynamic QRL module loading

Published Mar 3, 2026 · Updated Mar 3, 2026

Unsafe deserialization in QwikDev Qwik before 1.19.1 allows remote attackers to execute arbitrary code through server$ RPC requests. The server platform's importSymbol path turns an attacker-controlled QRL module URL into a require() path and returns the requested export without restricting it to registered symbols. Exploitation requires a server deployment where require() is available, and successful code runs with the Qwik service process's permissions.

CVSS severity9.2
Critical
EPSS probability5.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in QwikDev Qwik before 1.19.1 allows remote attackers to execute arbitrary code through server$ RPC requests. The server platform's importSymbol path turns an attacker-controlled QRL module URL into a require() path and returns the requested export without restricting it to registered symbols. Exploitation requires a server deployment where require() is available, and successful code runs with the Qwik service process's permissions.

The record

CVE
CVE-2026-27971
Published
Mar 3, 2026
Updated
Mar 3, 2026
Vendor
QwikDev
Product
Qwik
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.19.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

QwikDev · Qwikversion=< 1.19.1

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.2GitHub, Inc.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 describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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