CVE-2026-82291
HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials
- State
- Published
- Severity
- 8.1 High
- Published
- Aug 28, 2026
- Updated
- Sep 24, 2026
- Reserved
- Aug 28, 2026
Description
HeyForm before 3.0.0-rc.8 reflects the request Origin header in CORS responses while allowing credentials, enabling cross-origin requests with authentication. Attackers can execute authenticated GraphQL queries from malicious pages visited by logged-in users to access workspaces, projects, forms, submissions, and respondent data, or modify account settings.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains
Affected Products
| Product | Versions |
|---|---|
heyformheyform |
|
References
- GitHub Security Advisory (GHSA-fg7j-rmgr-rc9g)vendor-advisory
- Vulnerable code: main.tstechnical-description
- Fix commitpatch
- https://github.com/heyform/heyformproduct
- VulnCheck Advisory: HeyForm Reflects Any Origin in CORS Responses While Allowing Credentialsthird-party-advisory
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