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CVE-2026-27971

Qwik remote code execution

9.8 CRITICALEPSS 2.88%
  1. Published3 Mar 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Qwik< 1.19.1

Remediation

Fixed in
Qwik≥ 1.19.1

References

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Frequently asked

Is CVE-2026-27971 being actively exploited?

CVE-2026-27971 is not in the CISA KEV catalog. Its EPSS exploit probability is 2.88%.

How severe is CVE-2026-27971?

CVE-2026-27971 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 2.88% probability of exploitation.

Which products are affected by CVE-2026-27971?

Affected products include Qwik.

How do I fix CVE-2026-27971?

Upgrade affected software to a fixed version, for example Qwik 1.19.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-27971 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.