Is CVE-2026-82291 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-82291?

CVE-2026-82291 has a CVSS v3 severity of HIGH (8.1).

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CVE-2026-82291

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.