---
id: CVE-2026-55659
title: Grist is spreadsheet software using Python as its formula language
summary: >-
  Grist is spreadsheet software using Python as its formula language. Prior to
  1.7.15, several server-rendered Grist pages embedded user-controlled values
  into the page and into inline scripts without fully escaping them, allowing
  cross-si…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N'
cwe:
  - CWE-79
  - CWE-116
published: '2026-07-10'
updated: '2026-07-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55659'
references:
  - url: >-
      https://github.com/gristlabs/grist-core/commit/4ced8064b7ea0e1763d5a6a2588b22774ce7efbc
    label: security-advisories@github.com
  - url: 'https://github.com/gristlabs/grist-core/releases/tag/v1.7.15'
    label: security-advisories@github.com
  - url: >-
      https://github.com/gristlabs/grist-core/security/advisories/GHSA-6qrq-h2h6-cw54
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00364
epssPercentile: 0.27451
ingestedAt: '2026-07-11T20:15:26.922Z'
---

## Overview

Grist is spreadsheet software using Python as its formula language. Prior to 1.7.15, several server-rendered Grist pages embedded user-controlled values into the page and into inline scripts without fully escaping them, allowing cross-site scripting. On the main application page, a document's name or description, set by a document editor, is rendered into the page that other users load when opening the document. On the OAuth2 end-of-flow page, the openerOrigin request parameter was reflected back into the served page. Injected script runs in the victim's Grist origin and can act through the authenticated session, reading or modifying data and changing sharing settings and access rules. A document editor could therefore escalate to owner-level access. This issue is fixed in version 1.7.15.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.