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Token Optimizer MCP: OS command injection in smart_user via username in get-user-info

Type: advisorySource: Official CVE List1 source record

Token Optimizer MCP measures token savings per AI coding agent, optimizes context, and shares a live local knowledge graph across 16 CLI clients. Prior to version 5.1.0, token-optimizer-mcp is vulnerable to OS command injection in the smart_user tool. Any MCP client that can call the smart_user tool can execute arbitrary shell commands through the username argument of the get-user-info operation. The commands execute with the privileges of the user running the token-optimizer-mcp server. This issue has been patched in version 5.1.0.

Announced Source revision 1
Original source ↗

CVE-2026-55157

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-55157

token-optimizer-mcp

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "ooples",
    "product": "token-optimizer-mcp",
    "versions": [
      {
        "status": "affected",
        "version": "< 5.1.0"
      }
    ]
  }
]
Related CVEs
CVE-2026-55157

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#5274 · Revision 1
Added to Heist Feed
Publisher date
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