CVE-2026-49250
CVE-2026-49250 · Conform: parseSubmission vulnerable to CPU exhaustion when parsing many unique form fields
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 8.7 · High · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
conform
- Versions
- >= 1.8.0, < 1.19.4: Affected
No fix published
@conform-to/dom npm
- Affected ranges
- SEMVER: ≥ 1.8.0, < 1.19.4
Update to 1.19.4