CVE-2026-62312
highpriority · track · 0EPSS 0.009 · 60 %ileEUEPSS · scored 2026-10-27
9Router is an AI router & token saver. Prior to 0.5.2, 9Router allows a remote authenticated attacker to achieve arbitrary code execution on the host operating system by combining a Host header bypass of localhost-only routes with unvalidated MCP plugin args passed to child_process.spawn(), allowing malicious custom plugins to execute commands through /api/mcp//sse. This issue is fixed in version 0.5.2.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (1)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dccnnvd
- https://github.com/decolua/9router/releasesPatchcnnvd
- https://github.com/decolua/9router/releases/tag/v0.5.2cnnvd
- https://github.com/decolua/9router/security/advisories/GHSA-63p9-g54h-prrpcnnvd
- https://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dcenisa_euvd
- https://github.com/decolua/9router/releases/tag/v0.5.2enisa_euvd
- https://github.com/decolua/9router/security/advisories/GHSA-63p9-g54h-prrpenisa_euvd
- https://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dcnvd
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