Vulnerability details
CVE-2026-82291
heyform heyform
HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials
CVSS 3.1
8.1High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.1High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| heyform | heyform | v < 3.0.0-rc.8 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts technical-description
- https://github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4 patch
- https://github.com/heyform/heyform product
- https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials third-party-advisory
- https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g vendor-advisory
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-08-28
- Last updated
- 2026-09-24
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.55%
Probability of exploitation in 30 days
46.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-942Permissive Cross-domain Security Policy with Untrusted Domains