Low severityNVD Advisory· Published Apr 17, 2026· Updated Apr 29, 2026

CVE-2026-35402

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.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
mcp-neo4j-cypherPyPI	< 0.6.0	0.6.0

Affected products

Neo4j Contrib/Mcp Neo4jreferences

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

github.com/advisories/GHSA-x3cv-r3g3-fpg9ghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2026-35402ghsaADVISORY
github.com/neo4j-contrib/mcp-neo4j/releases/tag/mcp-neo4j-cypher-v0.6.0nvdWEB
github.com/neo4j-contrib/mcp-neo4j/security/advisories/GHSA-x3cv-r3g3-fpg9nvdWEB

News mentions

No linked articles in our index yet.

cvss	0.065
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000