HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-82291
StatePUBLISHED
AssignerVulnCheck
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 20:20:20 UTC
Updated2026-08-28 20:20:20 UTC
DescriptionHeyForm 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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

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

Problem Types: CWE-942 | CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
3.1CNACVSS8.1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Heyform Heyform affected 3.0.0-rc.8 semver Not specified

References

ReferenceSourceLinkTags
github.com/heyform/heyform [email protected] github.com
github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g [email protected] github.com
github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts [email protected] github.com
www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-whil... [email protected] www.vulncheck.com
github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: George Chen (en)

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