GHSA-525m-7f82-2mf7

Source

https://github.com/advisories/GHSA-525m-7f82-2mf7

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-525m-7f82-2mf7/GHSA-525m-7f82-2mf7.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-525m-7f82-2mf7

Aliases

CVE-2026-49250

Published

2026-07-02T19:18:41Z

Modified

2026-09-10T03:51:10Z

Severity

8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

@conform-to/dom parseSubmission vulnerable to CPU exhaustion when parsing many unique form fields

Details

A CPU exhaustion vulnerability exists in Conform's parseSubmission future API when parsing FormData or URLSearchParams submissions with many unique field names. The parser previously looked up values by field name, which could require repeated scans of the submitted entries and cause excessive synchronous CPU work if an attacker supplies a crafted submission.

[!NOTE] The patched version fixes this by iterating submitted entries directly instead of repeatedly looking up values by field name. Applications that accept untrusted form submissions should still enforce request parsing limits before passing data to Conform. For multipart requests, @remix-run/form-data-parser provides maxParts, maxTotalSize, maxFileSize, maxFiles, and maxHeaderSize options.

Database specific

{
    "cwe_ids": [
        "CWE-407"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-02T19:18:41Z",
    "nvd_published_at": null,
    "severity": "HIGH"
}

References

Affected packages

npm / @conform-to/dom

Package

Name: @conform-to/dom; View open source insights on deps.dev
Purl: pkg:npm/%40conform-to/dom

Affected ranges

Type: SEMVER
Events: Introduced

1.8.0

Fixed

1.19.4

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-525m-7f82-2mf7/GHSA-525m-7f82-2mf7.json"