CVE-2026-55664 Grist: Insufficient access control in the /forms endpoint exposes table metadata
Attackers with partial read access can view hidden table and column metadata via the /forms endpoint, bypassing document access rules.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-55664?
CVE-2026-55664 is a medium-severity missing authorization vulnerability in gristlabs grist-core, published on 10 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-55664?
How do I fix CVE-2026-55664?
No fix has been published for CVE-2026-55664 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-55664 being exploited?
There is no known exploitation of CVE-2026-55664 in the wild and no public exploit code.
Sources
Also known as GHSA-w2hc-w6cg-xvh9.