---
id: CVE-2026-108604
title: >-
  Tabularis through 0.27.0 contains an incorrect authorization vulnerability in
  the MCP run_query safety gate that allows prompt-injected agents or untrusted
  MCP clients to bypass read-only mode by submitting side-effecting SELECT
  statemen…
summary: >-
  Tabularis through 0.27.0 contains an incorrect authorization vulnerability in
  the MCP run_query safety gate that allows prompt-injected agents or untrusted
  MCP clients to bypass read-only mode by submitting side-effecting SELECT
  statemen…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H'
cwe:
  - CWE-863
published: '2026-10-10'
updated: '2026-10-10'
sourceUpdated: '2026-10-10T20:16:32.947'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108604'
references:
  - url: 'https://github.com/TabularisDB/tabularis'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/TabularisDB/tabularis/blob/804c4c3bb6fd8eaa2e36cbe49f6c0d58f373b5e9/src-tauri/src/ai_activity.rs#L357-L416
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/TabularisDB/tabularis/blob/804c4c3bb6fd8eaa2e36cbe49f6c0d58f373b5e9/src-tauri/src/mcp/mod.rs#L1136-L1171
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind/S1BofaIsMx'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/tabularis-through-0.27.0-read-only-bypass-via-mcp-run-query-select-classification
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-10T20:31:30.635Z'
---

## Overview

Tabularis through 0.27.0 contains an incorrect authorization vulnerability in the MCP run_query safety gate that allows prompt-injected agents or untrusted MCP clients to bypass read-only mode by submitting side-effecting SELECT statements. Attackers can run statements like SELECT setval, nextval, or PostgreSQL query_to_xml with embedded DELETE to modify data without approval prompts.

## Remediation

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