CVE-2026-32701Network attack vector

Unauthenticated service interruption via array property overwrite

Published Mar 20, 2026 · Updated Mar 20, 2026

Type confusion in Qwik City before 1.19.2 allows remote attackers to interrupt service through crafted form submissions. The formToObj parser treats a dotted path as an array after seeing numeric child keys, then permits later non-index keys such as length or push to overwrite array properties. No authentication is required when a public route parses URL-encoded or multipart form data; malformed arrays can trigger runtime errors or excessive memory and server work.

CVSS severity7.5
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in Qwik City before 1.19.2 allows remote attackers to interrupt service through crafted form submissions. The formToObj parser treats a dotted path as an array after seeing numeric child keys, then permits later non-index keys such as length or push to overwrite array properties. No authentication is required when a public route parses URL-encoded or multipart form data; malformed arrays can trigger runtime errors or excessive memory and server work.

The record

CVE
CVE-2026-32701
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
QwikDev
Product
Qwik
Classifications
CWE-1321, CWE-843, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 1.19.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

QwikDev · Qwikversion=< 1.19.2

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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