vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-49250

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

HIGH
8.7
CVSS Score
Published: September 14, 2026 at 05:14 PM UTC
Updated: September 30, 2026 at 07:57 PM UTC
1 product affected across 1 vendorConform

Using conform by edmundhung?

Get instant alerts when new vulnerabilities affect conform - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH8.7
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Conform· Edmundhung
60%
v < 1.19.4
Affected range stops below 1.19.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_CONFIRM
Source: cverecord
https://github.com/edmundhung/conform/security/advisories/GHSA-525m-7f82-2mf7
x_refsource_MISC
Source: cverecord
https://github.com/edmundhung/conform/commit/f9a1e696ef950efcada5f06ea2b202da505bf9b0
x_refsource_MISC
Source: cverecord
https://github.com/edmundhung/conform/releases/tag/v1.19.4

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-407

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card