---
id: CVE-2026-85726
title: 'Chartbrew: Blind NoSQL injection via date variable in embedded chart'
summary: >-
  Chartbrew is an open-source web application that can connect directly to
  databases and APIs and use the data to create charts. Prior to 5.2.3, a
  date-typed MongoDB variable placed inside a quoted query placeholder was
  inserted as an unes…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-943
vendor: chartbrew
product: chartbrew
affected:
  - chartbrew < 5.2.3
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T21:08:18.807Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-85726'
references:
  - url: >-
      https://github.com/chartbrew/chartbrew/security/advisories/GHSA-mr45-2r9x-cgwf
    label: >-
      https://github.com/chartbrew/chartbrew/security/advisories/GHSA-mr45-2r9x-cgwf
  - url: >-
      https://github.com/chartbrew/chartbrew/commit/9e30fbd0d4a34033813a22bebb6fa6c9ae784d6b
    label: >-
      https://github.com/chartbrew/chartbrew/commit/9e30fbd0d4a34033813a22bebb6fa6c9ae784d6b
  - url: 'https://github.com/chartbrew/chartbrew/releases/tag/v5.2.3'
    label: 'https://github.com/chartbrew/chartbrew/releases/tag/v5.2.3'
tags:
  - cve.org
ingestedAt: '2026-11-06T22:04:56.329Z'
epss: 0.00307
epssPercentile: 0.2372
---

## Overview

Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. Prior to 5.2.3, a date-typed MongoDB variable placed inside a quoted query placeholder was inserted as an unescaped string, unlike the safely escaped or coerced string, number, and Boolean branches. The vulnerable surface is mongoDB-backed public, shareable, or embedded charts processed by date-variable substitution. An unauthenticated user supplies a crafted URL filter to a public, shareable, or embedded MongoDB chart whose query places a date-typed variable in a quoted literal. The crafted date value breaks out of the quoted literal and changes query logic; the chart's returned row count becomes a Boolean oracle for character-by-character field extraction. The chart must be externally reachable and use the vulnerable date-in-quoted-placeholder branch. Extraction is read-only and limited to one queried collection per request, and it requires neither an account nor a known field value. The blind oracle can disclose any field in the queried collection, including secrets the chart does not display. This issue is fixed in version 5.2.3.

## Affected

- `chartbrew < 5.2.3`

## Remediation

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