CVE-2026-82291 (GCVE-0-2026-82291)

Vulnerability from cvelistv5 – Published: 2026-08-28 16:19 – Updated: 2026-08-29 11:48
VLAI
Title
HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials
Summary
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.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE
  • CWE-942 - Permissive Cross-domain Security Policy with Untrusted Domains
Assigner
References
Impacted products
Vendor Product Version CPE status
heyform heyform Affected: 0 , < 3.0.0-rc.8 (semver)
guessed Create a notification for this product.
Date Public
2026-06-23 00:00
Credits
George Chen
Show details on NVD website
To clipboard 

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          "vendor": "heyform",
          "versions": [
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              "version": "0",
              "versionType": "semver"
            }
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          "type": "reporter",
          "value": "George Chen"
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        }
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            "confidentialityImpact": "HIGH",
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            "userInteraction": "REQUIRED",
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          },
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      ],
      "problemTypes": [
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              "description": "Permissive Cross-domain Security Policy with Untrusted Domains",
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            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T11:48:21.218Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
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          "name": "GitHub Security Advisory (GHSA-fg7j-rmgr-rc9g)",
          "tags": [
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          "url": "https://github.com/heyform/heyform/security/advisories/GHSA-fg7j-rmgr-rc9g"
        },
        {
          "name": "Vulnerable code: main.ts",
          "tags": [
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          "url": "https://github.com/heyform/heyform/blob/v3.0.0-rc.7/packages/server/src/main.ts"
        },
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        },
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          "tags": [
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          "url": "https://github.com/heyform/heyform"
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          "tags": [
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          "url": "https://www.vulncheck.com/advisories/heyform-reflects-any-origin-in-cors-responses-while-allowing-credentials"
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      ],
      "title": "HeyForm Reflects Any Origin in CORS Responses While Allowing Credentials",
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-82291",
    "datePublished": "2026-08-28T16:19:07.930Z",
    "dateReserved": "2026-08-28T11:12:54.442Z",
    "dateUpdated": "2026-08-29T11:48:21.218Z",
    "state": "PUBLISHED"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.