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CVE-2026-82291

HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials

CVSS 3.1 8.1 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-82291

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-82291

Published

heyform

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "heyform",
                    "product": "heyform",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "3.0.0-rc.8",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON