CVE-2026-108604 Details
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.
A vulnerability exists in Tabularis versions through 0.27.0, specifically within the MCP 'run_query' safety mechanism. This flaw allows untrusted MCP clients or prompt-injected agents to circumvent read-only restrictions by sending side-effecting SELECT queries. Such queries can manipulate data without triggering approval prompts, exploiting the application's trust in the 'SELECT' keyword classification.
Users can manually disable the MCP integration or avoid using prompt-injected agents until a patch is applied. The upcoming Tabularis release 0.28.0 is expected to address this vulnerability by introducing a read-only transaction for MCP queries, preventing the execution of side-effecting SELECT statements.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 10, 2026CISA-ADP
Assessed Oct 13, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-863 | Incorrect Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Tabularis | <= 0.27.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 13, 2026 | CVE Modified | CISA-ADP |
| Oct 10, 2026 | New CVE Received | [email protected] |