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CVE-2026-82291— HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials

Quick assessment

Affected
heyform heyform
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HeyForm 在 3.0.0-rc.8 之前的版本在 CORS 响应中反射了请求的 Origin 头，同时允许携带凭证（credentials）。这使得攻击者能够发起带认证的跨域请求。当已登录用户访问恶意网页时，攻击者可以利用该页面执行经过认证的 GraphQL 查询，从而访问工作区（workspaces）、项目（projects）、表单（forms）、提交数据（submissions）和受访者数据（respondent data），或修改账户设置。

CVSS 8.1 · High EPSS 0.30% · P22

Affected Version Matrix 1

VendorProduct Version RangeStatus
heyform heyform < 3.0.0-rc.8 affected
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I. Basic Information for CVE-2026-82291

Vulnerability Information
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Vulnerability Title
HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过度许可的跨域白名单
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
heyform heyform 0 ~ 3.0.0-rc.8 -

II. Public POCs for CVE-2026-82291

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-82291

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Patches & Fixes for CVE-2026-82291 (2)

Vendor Advisories for CVE-2026-82291 (2)

Vendor Pages for CVE-2026-82291 (1)

IV. Related Vulnerabilities

Same product: heyform
Same vendor: heyform
Same weakness: CWE-942

V. Comments for CVE-2026-82291

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