CVE-2026-35402

LOW

mcp-neo4j-cypher: SSRF and Data Modification via read_only Mode Bypass Through CALL Procedures

Title source: cna

Description

mcp-neo4j-cypher is an MCP server for executing Cypher queries against Neo4j databases. In versions prior to 0.6.0, the read_only mode enforcement can be bypassed using APOC CALL procedures, potentially allowing unauthorized write operations or server-side request forgery. This issue is fixed in version 0.6.0.

References (2)

Core 2

Core References

X_Refsource_Confirm x_refsource_confirm

https://github.com/neo4j-contrib/mcp-neo4j/security/advisories/GHSA-x3cv-r3g3-fpg9

X_Refsource_Misc x_refsource_misc

https://github.com/neo4j-contrib/mcp-neo4j/releases/tag/mcp-neo4j-cypher-v0.6.0

Scores

CVSS v4 2.3

EPSS 0.0026

EPSS Percentile 17.5%

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-284

Status published

Products (2)

neo4j-contrib/mcp-neo4j < 0.6.0

pypi/mcp-neo4j-cypher 0 - 0.6.0PyPI

Published Apr 17, 2026

Tracked Since Apr 18, 2026