CVE-2026-32701

Qwik has array method pollution in FormData processing, allowing type confusion and DoS

Published Mar 20, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
Qwik is a performance-focused JavaScript framework. Versions prior to 1.19.2 improperly inferred arrays from dotted form field names during FormData parsing. By submitting mixed array-index and object-property keys for the same path, an attacker could cause user-controlled properties to be written onto values that application code expected to be arrays. When processing application/x-www-form-urlencoded or multipart/form-data requests, Qwik City converted dotted field names (e.g., items.0, items.1) into nested structures. If a path was interpreted as an array, additional attacker-supplied keys on that path—such as items.toString, items.push, items.valueOf, or items.length—could alter the resulting server-side value in unexpected ways, potentially leading to request handling failures, denial of service through malformed array state or oversized lengths, and type confusion in downstream code. This issue was fixed in version 1.19.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-whhv-gg5v-864r Qwik City has array method pollution in FormData processing allows type confusion and DoS
History
Type Values Removed Values Added
First Time appeared Qwik
Qwik qwik
CPEs cpe:2.3:a:qwik:qwik:*:*:*:*:*:node.js:*:*
Vendors & Products Qwik
Qwik qwik
Type Values Removed Values Added
First Time appeared Qwikdev
Qwikdev qwik
Vendors & Products Qwikdev
Qwikdev qwik
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Qwik is a performance-focused JavaScript framework. Versions prior to 1.19.2 improperly inferred arrays from dotted form field names during FormData parsing. By submitting mixed array-index and object-property keys for the same path, an attacker could cause user-controlled properties to be written onto values that application code expected to be arrays. When processing application/x-www-form-urlencoded or multipart/form-data requests, Qwik City converted dotted field names (e.g., items.0, items.1) into nested structures. If a path was interpreted as an array, additional attacker-supplied keys on that path—such as items.toString, items.push, items.valueOf, or items.length—could alter the resulting server-side value in unexpected ways, potentially leading to request handling failures, denial of service through malformed array state or oversized lengths, and type confusion in downstream code. This issue was fixed in version 1.19.2.
Title Qwik has array method pollution in FormData processing, allowing type confusion and DoS
Weaknesses CWE-1321
CWE-843
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Mar 20, 2026, 12:07 PM
Reserved
Mar 13, 2026, 2:33 PM
Status
Analyzed
Published
Mar 20, 2026, 9:16 AM
Modified
Jun 17, 2026, 10:36 AM