Medium severity · published Oct 10, 2026
CVE-2026-108604
Tabularis through 0.27.0 Read-Only Bypass via MCP run_query SELECT Classification
6.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TA
tabularis · TabularisDB
through 0.27.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-108604
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-108604
third-party-advisory
https://hackmd.io/@haind/S1BofaIsMx
technical-description
https://github.com/TabularisDB/tabularis/blob/804c4c3bb6fd8eaa2e36cbe49f6c0d58f373b5e9/src-tauri/src/ai_activity.rs#L357-L416
technical-description
https://github.com/TabularisDB/tabularis/blob/804c4c3bb6fd8eaa2e36cbe49f6c0d58f373b5e9/src-tauri/src/mcp/mod.rs#L1136-L1171
product
https://github.com/TabularisDB/tabularis
third-party-advisory
https://www.vulncheck.com/advisories/tabularis-through-0.27.0-read-only-bypass-via-mcp-run-query-select-classification
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