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CVE-2026-108604— Tabularis through 0.27.0 Read-Only Bypass via MCP run_query SELECT Classification

Quick assessment

Affected
TabularisDB tabularis
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tabularis 在 0.27.0 及之前版本中存在一个不正确的授权漏洞，该漏洞位于 MCP 的 run_query 安全门控中。此漏洞允许经过提示注入的代理或不受信任的 MCP 客户端绕过只读模式，通过提交具有副作用的 SELECT 语句来执行数据修改操作。攻击者可以运行诸如 SELECT setval、nextval 或 PostgreSQL 的 query_to_xml 等语句，其中嵌入 DELETE 操作，从而在无需审批提示的情况下修改数据。

CVSS 6.3 · Medium EPSS 0.13% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
TabularisDB tabularis ≤ 0.27.0 affected
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I. Basic Information for CVE-2026-108604

Vulnerability Information
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Vulnerability Title
Tabularis through 0.27.0 Read-Only Bypass via MCP run_query SELECT Classification
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
TabularisDB tabularis 0 ~ 0.27.0 -

II. Public POCs for CVE-2026-108604

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III. Intelligence Information for CVE-2026-108604

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Patches & Fixes for CVE-2026-108604 (1)

Vendor Advisories for CVE-2026-108604 (1)

Proof of Concept for CVE-2026-108604 (1)

Security Blog Posts for CVE-2026-108604 (1)

Other References for CVE-2026-108604 (1)

IV. Related Vulnerabilities

Same weakness: CWE-863

V. Comments for CVE-2026-108604

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