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.
Project Subscriptions
No data.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-525m-7f82-2mf7 | @conform-to/dom parseSubmission vulnerable to CPU exhaustion when parsing many unique form fields |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Mon, 14 Sep 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Conform: parseSubmission vulnerable to CPU exhaustion when parsing many unique form fields | |
| Weaknesses | CWE-407 | |
| References |
| |
| Metrics |
cvssV4_0
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-09-14T19:01:26.926Z
Reserved: 2026-05-28T14:33:01.178Z
Link: CVE-2026-49250
Updated: 2026-09-14T19:01:21.958Z
Status : Received
Published: 2026-09-14T18:17:49.360
Modified: 2026-09-14T19:17:23.587
Link: CVE-2026-49250
No data.
OpenCVE Enrichment
No data.
Weaknesses
Github GHSA