> CVE-2026-55157 [HIGH]

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PUBLISHED
2026-09-28 18:17
MODIFIED
2026-09-28 18:17
CVSS_SCORE V3
8.4
EPSS (Prob. Exploit)
0.71%
Top 47.3%
DATA SOURCES:
NVD đź”— 2026-09-28 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-22 GITHUB đź”— 2026-10-04 OSV đź”— 2026-10-19

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EXPLOITABILITY
2.5
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-78

> CWE DETAILED DESCRIPTIONS

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') - The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

> GITHUB SECURITY ADVISORY

GHSA-49mq-fc6q-3h46 HIGH

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

AFFECTED PACKAGES:
NPM / @ooples/token-optimizer-mcp
< 5.1.0
Fixed in: 5.1.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

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

AFFECTED PACKAGES:
Unknown / Unknown
46 versions affected
ALIASES:
GHSA-49mq-fc6q-3h46

> HISTORIQUE DES MODIFICATIONS

Première apparition
28/09/2026 18:17
Source: NVD
đź“Š ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') - The product constructs all or part of an OS command using externally-influenced input from an upstr...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c1784...
https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0
https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q...
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