HIGH 8.7 NVD
CVE-2026-49250
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
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.
References
- https://github.com/edmundhung/conform/commit/f9a1e696ef950efcada5f06ea2b202da505bf9b0
- https://github.com/edmundhung/conform/releases/tag/v1.19.4
- https://github.com/edmundhung/conform/security/advisories/GHSA-525m-7f82-2mf7
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-09-14 via NVD.
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