# CVE-2026-82291

## Summary

- **CVE ID:** CVE-2026-82291
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N)
- **CWE:** CWE-942
- **Published:** Aug 28, 2026
- **Last Modified:** Aug 31, 2026

## 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.

## Affected Products

- heyform — heyform (0)

## References

- [CNA](https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g)
- [CNA](https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts)
- [CNA](https://github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4)
- [CNA](https://github.com/heyform/heyform)
- [CNA](https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.30%
- **EPSS Percentile:** 22.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._