CVE-2026-82291

EUVD-2026-67822
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.1 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 22.1%
Common Weakness Enumeration
References
https://github.com/heyform/heyform
https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts
https://github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4
https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g
https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials