CVE-2026-82291highCWE-942

CVE-2026-82291: high-severity vulnerability in heyform

HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials

Published · Updated

Follow this CVE+ Monitor heyform

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.1epss 0.6%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Affected products
heyform · heyform
Related CVEs — heyform

In the same product, most dangerous first.

CVE-2026-45797MEDIUMHeyForm Vulnerable to Stored XSS via Unauthenticated SVG File UploadEPSS 0.6%CVE-2026-63429HIGHHeyForm has unauthenticated /api/upload endpoint that accepts arbitrary files with no auth/session/form contextEPSS 0.5%CVE-2026-35198CRITICALHeyForm vulnerable to stored XSS via form field titlesEPSS 0.5%CVE-2026-63428MEDIUMHeyForm: completeSubmission persists submitter-supplied hidden fields verbatim without validating against the form's declared hidden-field setEPSS 0.3%