gristlabs grist-core up to 1.7.14 Forms Endpoint api/forms.py information disclosure

Summaryinfo

A vulnerability classified as problematic has been found in gristlabs grist-core up to 1.7.14. Impacted is an unknown function of the file api/forms.py of the component Forms Endpoint. This manipulation causes information disclosure. This vulnerability is registered as CVE-2026-55664. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in gristlabs grist-core up to 1.7.14 and classified as problematic. Affected by this vulnerability is some unknown processing of the file api/forms.py of the component Forms Endpoint. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

Grist is spreadsheet software using Python as its formula language. Prior to 1.7.15, the GET /forms endpoint read table and column metadata without applying the document's access rules and did not check that the requested section was actually a form. A user with only partial read access, including public access on a publicly viewable document, could request the metadata of any widget and reveal table and column structure that access rules would otherwise hide, even in documents that contain no forms. This issue is fixed in version 1.7.15.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-55664 since 06/17/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 1.7.15 eliminates this vulnerability.

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Productinfo

Vendor

• gristlabs

Name

• grist-core

Version

• 1.7.0
• 1.7.1
• 1.7.2
• 1.7.3
• 1.7.4
• 1.7.5
• 1.7.6
• 1.7.7
• 1.7.8
• 1.7.9
• 1.7.10
• 1.7.11
• 1.7.12
• 1.7.13
• 1.7.14

Website

• Product: https://github.com/gristlabs/grist-core/

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