Vulnerability-Lookup

CVE-2026-75110 (GCVE-0-2026-75110)

Vulnerability from cvelistv5 – Published: 2026-08-17 20:36 – Updated: 2026-08-18 12:51

Title

MemOS Authentication Bypass via Unset INTERNAL_SERVICE_SECRET

Summary

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

9.3 (Critical)


                        
                          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

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 12:48 UTC

CWE

CWE-697 - Incorrect Comparison

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/MemTensor/MemOS/issues/2259	issue-tracking
https://github.com/MemTensor/MemOS	product
https://github.com/MemTensor/MemOS/blob/main/src/…	technical-description
https://www.vulncheck.com/advisories/memos-authen…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
MemTensor	MemOS	Affected: 0 , ≤ 2.0.30 (custom)	guessed

Date Public

2026-08-16 00:00

Credits

George Chen

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-75110

Vulnerability from fkie_nvd - Published: 2026-08-17 21:16 - Updated: 2026-08-18 13:17

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/MemTensor/MemOS
	disclosure@vulncheck.com	https://github.com/MemTensor/MemOS/blob/main/src/memos/api/middleware/auth.py
	disclosure@vulncheck.com	https://github.com/MemTensor/MemOS/issues/2259
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/memos-authentication-bypass-via-unset-internal-service-secret
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/MemTensor/MemOS/issues/2259

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/MemTensor/MemOS/issues/2259"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/memos-authentication-bypass-via-unset-internal-service-secret"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/MemTensor/MemOS/issues/2259"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-697"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-V9VW-CCQP-Q298

Vulnerability from github – Published: 2026-08-17 21:31 – Updated: 2026-08-17 21:31

Details

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.3 (Critical)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-75110"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-697"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-17T21:16:50Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-v9vw-ccqp-q298",
  "modified": "2026-08-17T21:31:27Z",
  "published": "2026-08-17T21:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75110"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MemTensor/MemOS/issues/2259"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MemTensor/MemOS"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MemTensor/MemOS/blob/main/src/memos/api/middleware/auth.py"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/memos-authentication-bypass-via-unset-internal-service-secret"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-75110 (GCVE-0-2026-75110)

FKIE_CVE-2026-75110

GHSA-V9VW-CCQP-Q298

Tags

Sightings

Nomenclature