CVE-2026-82291CWE-942

CVE-2026-82291

High · published August 29, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
22.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00300 · 22.3th percentile
Weakness
CWE-942 · Permissive Cross-domain Security Policy with Untrusted Domains
Published
2026-08-29T00:20Z
References (6)
https://github.com/heyform/heyform · [email protected]https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts · [email protected]https://github.com/heyform/heyform/commit/bf9d738ca70ae5641c0c7372982b00365c5144d4 · [email protected]https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g · [email protected]https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials · [email protected]https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 30 AUG 16:19Z
    EPSS moved — → 0%
    epss
  • 28 AUG 16:19Z
    HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials
    cvelistv5