CVE-2026-55157

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Source
https://cve.org/CVERecord?id=CVE-2026-55157
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55157.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55157
Aliases
Published
2026-09-28T17:48:16Z
Modified
2026-09-30T03:47:25Z
Severity
  • 8.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Token Optimizer MCP: OS command injection in smart_user via username in get-user-info
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-78"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55157.json"
}
References

Affected packages

Git / github.com/ooples/token-optimizer-mcp

Affected ranges

Type
GIT
Repo
https://github.com/ooples/token-optimizer-mcp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7
Fixed
94815a16e3322101694e97561fc1dc8b5af904dc
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "5.1.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*
v1.0.0
v2.*
v2.0.0
v2.1.0
v2.10.0
v2.10.1
v2.11.0
v2.12.0
v2.12.1
v2.12.2
v2.13.0
v2.14.0
v2.15.0
v2.15.1
v2.15.2
v2.16.0
v2.17.0
v2.18.0
v2.19.0
v2.19.1
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.3.0
v2.4.0
v2.4.1
v2.5.0
v2.6.0
v2.7.0
v2.8.0
v2.9.0
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.0.4
v3.1.0
v4.*
v4.0.0
v4.0.1
v4.1.0
v4.2.0
v5.*
v5.0.0
v5.0.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55157.json"