CVE-2026-75110Public exploitNetwork attack vectorHinoki check available

Unauthenticated admin access via fail-open secret check

Published Aug 17, 2026 · Updated Aug 18, 2026

Authentication bypass in MemTensor MemOS 2.0.30 and earlier allows remote attackers to reach admin APIs via a missing X-Internal-Service header. In src/memos/api/middleware/auth.py, is_internal_request() directly compares request.headers.get("X-Internal-Service") with os.getenv("INTERNAL_SERVICE_SECRET"); when the secret is unset, both values are None and the check incorrectly classifies the request as trusted internal traffic. Reachability requires AUTH_ENABLED=true together with an unset INTERNAL_SERVICE_SECRET, after which header-less requests receive scopes ["all"], can mint or revoke API keys, and can generate a master key for persistent privileged access.

CVSS severity9.3
Critical
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in MemTensor MemOS 2.0.30 and earlier allows remote attackers to reach admin APIs via a missing X-Internal-Service header. In src/memos/api/middleware/auth.py, is_internal_request() directly compares request.headers.get("X-Internal-Service") with os.getenv("INTERNAL_SERVICE_SECRET"); when the secret is unset, both values are None and the check incorrectly classifies the request as trusted internal traffic. Reachability requires AUTH_ENABLED=true together with an unset INTERNAL_SERVICE_SECRET, after which header-less requests receive scopes ["all"], can mint or revoke API keys, and can generate a master key for persistent privileged access.

The record

CVE
CVE-2026-75110
Published
Aug 17, 2026
Updated
Aug 18, 2026
Vendor
MemTensor
Product
MemOS
Classifications
CWE-697, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.0.30

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MemTensor · MemOSversion=0 <=2.0.30

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-697Incorrect Comparison
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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