CVE-2026-75110

Full vulnerability record from the local CVENow database.

Description

MemOS is a memory operating system for LLMs and AI agents. In deployments where authentication is enabled (AUTH_ENABLED=true) but the undocumented, defaultless INTERNAL_SERVICE_SECRET environment variable is unset, the is_internal_request() check in src/memos/api/middleware/auth.py fails open: os.getenv("INTERNAL_SERVICE_SECRET") returns None and a request omitting the X-Internal-Service header also yields None, so the comparison None == None evaluates true. The request is then treated as a trusted internal principal and granted scopes: ["all"]. As a result, an unauthenticated remote attacker can reach the admin API-key management endpoints to mint API keys for any user, enumerate keys, revoke keys, and generate a master key for persistent privileged access, as well as all data endpoints.

Severity

CRITICAL

CVSS score

9.3 (v4.0)

Vulnerability status

Deferred

Source identifier

[email protected]

Published

2026-08-17 21:16:50.043000

Last modified

2026-10-23 16:10:00.313000

View original CVE JSON

{
  "id": "CVE-2026-75110",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-17T21:16:50.043",
  "lastModified": "2026-10-23T16:10:00.313",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "MemOS is a memory operating system for LLMs and AI agents. In deployments where authentication is enabled (AUTH_ENABLED=true) but the undocumented, defaultless INTERNAL_SERVICE_SECRET environment variable is unset, the is_internal_request() check in src/memos/api/middleware/auth.py fails open: os.getenv(\"INTERNAL_SERVICE_SECRET\") returns None and a request omitting the X-Internal-Service header also yields None, so the comparison None == None evaluates true. The request is then treated as a trusted internal principal and granted scopes: [\"all\"]. As a result, an unauthenticated remote attacker can reach the admin API-key management endpoints to mint API keys for any user, enumerate keys, revoke keys, and generate a master key for persistent privileged access, as well as all data endpoints."
    },
    {
      "lang": "es",
      "value": "MemOS es un sistema operativo de memoria para LLMs y agentes de IA. En despliegues donde la autenticación está habilitada (AUTH_ENABLED=true) pero la variable de entorno INTERNAL_SERVICE_SECRET, no documentada y sin valor por defecto, no está configurada, la verificación is_internal_request() en src/memos/api/middleware/auth.py falla abierta: os.getenv(“INTERNAL_SERVICE_SECRET”) devuelve None y una solicitud que omite el encabezado X-Internal-Service también produce None, por lo que la comparación None == None se evalúa como verdadera. La solicitud es entonces tratada como un principal interno de confianza y se le otorgan los alcances: [“all”]. Como resultado, un atacante remoto no autenticado puede acceder a los puntos finales de gestión de claves API de administrador para acuñar claves API para cualquier usuario, enumerar claves, revocar claves y generar una clave maestra para acceso privilegiado persistente, así como a todos los puntos finales de datos."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "MemTensor",
          "product": "MemOS",
          "defaultStatus": "unaffected",
          "repo": "https://github.com/MemTensor/MemOS",
          "packageURL": "pkg:pypi/MemoryOS",
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "2.0.30",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-18T12:48:39.747053Z",
          "id": "CVE-2026-75110",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-697"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/MemTensor/MemOS",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/MemTensor/MemOS/blob/main/src/memos/api/middleware/auth.py",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/MemTensor/MemOS/issues/2259",
      "source": "[email protected]"
    },
    {
      "url": "https://www.vulncheck.com/advisories/memos-authentication-bypass-via-unset-internal-service-secret",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/MemTensor/MemOS/issues/2259",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}