CVE-2026-25150
Qwik is a performance focused javascript framework. Prior to version 1.19.0, a prototype pollution vulnerability exists in the formToObj() function within @builder.io/qwik-city middleware. The function processes form field names with dot notation (e.g., user.name) to create nested objects, but fails to sanitize dangerous property names like __proto__, constructor, and prototype. This allows unauthenticated attackers to pollute Object.prototype by sending crafted HTTP POST requests, potentially leading to privilege escalation, authentication bypass, or denial of service. This issue has been patched in version 1.19.0.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.3
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L
- EPSS probability
- 0.65%
- CWE
- CWE-1321
- Published
- 2026-02-03
- Last modified
- 2026-03-12
Affected products
- QwikDev qwik
Weakness type
Related vulnerabilities
- CVE-2026-86078 — n8n: Prototype Pollution via Workflow Structure Summary Can Lead to Denial of Service
- CVE-2026-81994 — Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)
- CVE-2026-85625 — sift 17.1.3 Prototype Pollution Remote Code Execution via $where
- CVE-2026-63376 — toml-node: Prototype Pollution Leads to `Object.prototype` Corruption via `__proto__` Key-Path Desynchronization
- CVE-2026-85063 — node-csv: Prototype replacement still reachable via columns path
- CVE-2026-82404 — TOON: Prototype pollution when decoding untrusted TOON input
- CVE-2026-84368 — joi: Prototype pollution via a `__proto__` language key in custom messages
- CVE-2026-84367 — joi: object().rename() with a template target can set the validated object's prototype