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CVE-2026-62312

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1c0af76855c88b1d820d90033e77f83db9406c32175ef1e0972f25f157de89f5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"9router","vendor":"decolua","versions":[{"status":"affected","version":"< 0.5.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c95afa78a75730d22b0350d0a18b97f195affa02a846122802457be1fdfe65e2 · sha256:3934b0b9656a9a28… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c95afa78a75730d22b0350d0a18b97f195affa02a846122802457be1fdfe65e2 · sha256:3934b0b9656a9a28… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-78","description":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c95afa78a75730d22b0350d0a18b97f195affa02a846122802457be1fdfe65e2 · sha256:3934b0b9656a9a28… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dc","tags":["x_refsource_MISC"],"url":"https://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c95afa78a75730d22b0350d0a18b97f195affa02a846122802457be1fdfe65e2 · sha256:3934b0b9656a9a28… · /containers/cna/references/1
{"name":"https://github.com/decolua/9router/releases/tag/v0.5.2","tags":["x_refsource_MISC"],"url":"https://github.com/decolua/9router/releases/tag/v0.5.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c95afa78a75730d22b0350d0a18b97f195affa02a846122802457be1fdfe65e2 · sha256:3934b0b9656a9a28… · /containers/cna/references/2
{"name":"https://github.com/decolua/9router/security/advisories/GHSA-63p9-g54h-prrp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/decolua/9router/security/advisories/GHSA-63p9-g54h-prrp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c95afa78a75730d22b0350d0a18b97f195affa02a846122802457be1fdfe65e2 · sha256:3934b0b9656a9a28… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/decolua/9router/security/advisories/GHSA-63p9-g54h-prrp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c95afa78a75730d22b0350d0a18b97f195affa02a846122802457be1fdfe65e2 · sha256:3934b0b9656a9a28… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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