CVE-2026-32701 Qwik has array method pollution in FormData processing, allowing type confusion and DoS
Attackers can cause denial of service and type confusion in Qwik applications by submitting crafted form data with mixed array and object keys.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-32701?
CVE-2026-32701 is a high-severity vulnerability in QwikDev qwik, published on 20 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-32701?
2 open source packages ship an affected version, including @builder.io/qwik-city. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@builder.io/qwik-city npm | All versions | 1.19.2 |
@builder.io/qwik-city npm | All versions | 1.19.2 |
Products include Qwik Qwik.
How do I fix CVE-2026-32701?
Upgrade @builder.io/qwik-city to 1.19.2 or later.
Is CVE-2026-32701 being exploited?
There is no known exploitation of CVE-2026-32701 in the wild and no public exploit code.
Other vulnerabilities in QwikDev qwik
- CVE-2023-1283 Code Injection in builderio/qwik
- CVE-2026-25150 Prototype Pollution via FormData Processing in Qwik City
- CVE-2026-27971 Qwik affected by unauthenticated RCE via server$ Deserialization
- CVE-2024-41677 Cross-site Scripting (XSS) vulnerability due to improper HTML escaping in qwik
- CVE-2023-0410 Cross-site Scripting (XSS) - Generic in builderio/qwik
Sources
Also known as GHSA-whhv-gg5v-864r.