EUVD-2026-71227
GHSA-cm87-gp55-7cgj
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Restricted mode is designed to gate untrusted query input, so PR:N is defensible; bypassing that authority to read host files is a scope change (S:C) with confidentiality-only impact (C:H, I/A:N).
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
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.
Articles & Coverage 2
AnalysisAI
Arbitrary file read in Postgres MCP Pro 0.3.0 (crystaldba/postgres-mcp) lets attackers bypass restricted-mode SQL safeguards by invoking file-reading functions such as pg_read_file inside FROM-clause RangeFunction nodes, which the function-name allowlist fails to inspect. Any client able to submit queries to the MCP server can therefore read files accessible to the PostgreSQL service account despite the tool's safety controls. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires that the target run Postgres MCP Pro 0.3.0 with restricted mode enabled (the very control being bypassed) and that the attacker can submit SQL query text to the MCP server, e.g. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS 4.0 vector (9.2, AV:N/AC:L/PR:N/UI:N/VC:H/SC:H) reflects a network-reachable, low-complexity read of high-value data with a scope/subsequent-system impact on the underlying host filesystem, which is a credible characterization of a restricted-mode bypass. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch version is identified in the available data - the references point to the project repository and an open GitHub issue (#178), not to a tagged fixed release, so upgrade guidance cannot cite a confirmed version; monitor https://github.com/crystaldba/postgres-mcp for a release that extends function-name validation to RangeFunction/FROM-clause nodes. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Immediately restrict network access to all Postgres MCP Pro 0.3.0 instances to trusted hosts only and audit query logs for suspicious activity. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More in PostgreSQL
View allPostgreSQL libpq functions PQescapeLiteral(), PQescapeIdentifier(), PQescapeString(), and PQescapeStringConn() improperl
An issue was discovered in Appsmith before 1.52. Rated critical severity (CVSS 9.8), this vulnerability is remotely expl
Argument injection vulnerability in PostgreSQL 9.2.x before 9.2.4, 9.1.x before 9.1.9, and 9.0.x before 9.0.13 allows re
Unauthenticated arbitrary file write in Splunk Enterprise (below 10.2.4 and 10.0.7) and Splunk Cloud Platform (below 10.
Unauthenticated SQL injection in Sangoma Switchvox SMB Edition 8.3 (build 104997) lets remote attackers execute arbitrar
PostgreSQL versions before 9.2.22, 9.3.18, 9.4.13, 9.5.8 and 9.6.4 are vulnerable to incorrect authentication flaw allow
The build_tablename function in pgsql.c in the PostgreSQL (aka pgsql) extension in PHP through 5.6.7 does not validate t
A vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitra
In PostgreSQL 9.3 through 11.2, the "COPY TO/FROM PROGRAM" function allows superusers and users in the 'pg_execute_serve
Unauthenticated SQL injection in Vendure Shop API allows remote attackers to execute arbitrary SQL commands against the
Parse Server is an open source http web server backend. Rated critical severity (CVSS 10.0), this vulnerability is remot
Hard-coded default PostgreSQL credentials shipped in the docker-compose.yaml of langgenius Dify through version 1.5.1 al
Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today