HIGH

CVE-2026-49250

2026-09-14 CVSS v4.0

CVSS

8.7

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.

Weakness (CWE)

CWE-407

EPSS Score

0.3%

Probability of exploitation in next 30 days

22.4th percentile

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

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Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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