CVE-2026-55157Token Optimizer MCP: OS command injection in smart_user via username in get-user-info
Updated under an hour ago ()
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It affects ooples token-optimizer-mcp. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.70%, higher than 52% of scored CVEs.
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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.
- CVSS
- 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-78
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.70% (percentile 52)
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ooples token-optimizer-mcp ooples:token_optimizer_mcp (from the name) | before 5.1.0 | CNA record |
References
- https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46x-refsource-confirm
- https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7x-refsource-misc
- https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.