CVE-2026-82291

Published: Aug 28, 2026Modified: Aug 31, 2026

8.1

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitability: 2.8 / Impact: 5.2

Source: disclosure@vulncheck.com (Secondary)

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.

Related CWEs

Permissive Cross-domain Policy with Untrusted Domains

The product uses a cross-domain policy file that includes domains that should not be trusted.

References (6)

https://github.com/heyform/heyform

Source: disclosure@vulncheck.com

https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts

Source: disclosure@vulncheck.com

https://github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4

Source: disclosure@vulncheck.com

https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g

Source: disclosure@vulncheck.com

https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials

Source: disclosure@vulncheck.com

https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.