Postgres MCP Pro 0.3.0 Restricted-Mode Bypass via FROM-Clause Function
Priority MEDIUM 46CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-863.
Summary
Postgres MCP Pro 0.3.0 contains a restricted-mode bypass vulnerability where function-name validation is not applied to RangeFunction nodes in FROM clauses. Attackers can execute file-reading functions like pg_read_file through FROM-clause syntax to read arbitrary files despite restricted-mode protections.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00506 43rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| crystaldba | postgres-mcp | up to 0.3.0 | — | No fix listed | CNA |
- postgres-mcp Vendorcrystaldba Affected up to 0.3.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-85620
- 2026-10-03 Alias added: GHSA-cm87-gp55-7cgj
References
Sources
- CVE-2026-85620 · CVE Program
- CVE-2026-85620 · NVD
- FIRST EPSS
- GHSA-cm87-gp55-7cgj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences