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CVE-2026-49250

Conform: parseSubmission vulnerable to CPU exhaustion when parsing many unique form fields

Conform, a type-safe form validation library, allows the parsing of nested objects in the form of object.property. From 1.8.0 until 1.19.4, the parseSubmission future API in packages/conform-dom/formdata.ts repeatedly scans FormData or URLSearchParams entries by each unique field name. An unauthenticated attacker can submit a crafted form containing many unique names, causing excessive synchronous CPU work and denial of service in an application that passes the submission to parseSubmission. Applications should continue to enforce request parsing limits before invoking Conform. This issue is fixed in version 1.19.4.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Edmundhung
Products
Conform
CVE-2024-32866

Conform contains Prototype Pollution Vulnerability in `parseWith...` function

Conform, a type-safe form validation library, allows the parsing of nested objects in the form of `object.property`. Due to an improper implementation of this feature in versions prior to 1.1.1, an attacker can exploit the feature to trigger prototype pollution by passing a crafted input to `parseWith...` functions. Applications that use conform for server-side validation of form data or URL parameters are affected by this vulnerability. Version 1.1.1 contains a patch for the issue.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed
Vendors
Edmundhung
Products
Conform