CVE-2026-82291
HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-942 |
| Vendor | heyform |
| Product | heyform |
| Published | Aug 28, 2026 |
| Last Updated | Aug 29, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
heyform / heyform
0 < 3.0.0-rc.8
References
github.com: https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g github.com: https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts github.com: https://github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4 github.com: https://github.com/heyform/heyform vulncheck.com: https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials
Credits
🔍 George Chen