What’s Vulnerable › Vulnerabilities

CVE-2026-55664: Grist: Insufficient access control in the /forms endpoint exposes table metadata

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-10 · updated 2026-10-25
• Weakness: CWE-200

Description

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.

Affected products

• gristlabs grist-core: before 1.7.15

References

• https://github.com/gristlabs/grist-core/commit/14694156fe99c438c5f7a452ad367e933bb194db
• https://github.com/gristlabs/grist-core/releases/tag/v1.7.15
• https://github.com/gristlabs/grist-core/security/advisories/GHSA-w2hc-w6cg-xvh9

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