CVE-2026-75110

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-17. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 18, 2026

Advisory Details (4)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Authentication bypass in MemOS server: internal-service check fails open when INTERNAL_SERVICE_SECRET is unset · Issue #2259 · MemTensor/MemOS · GitHub

https://github.com/MemTensor/MemOS/issues/2259
generic

MemOS Authentication Bypass via Unset INTERNAL_SERVICE_SECRET | Advisories | VulnCheck

https://www.vulncheck.com/advisories/memos-authentication-bypass-via-unset-internal-service-secret
generic

MemOS/src/memos/api/middleware/auth.py at main · MemTensor/MemOS · GitHub

https://github.com/MemTensor/MemOS/blob/main/src/memos/api/middleware/auth.py
generic

GitHub - MemTensor/MemOS: Self-evolving memory OS for LLM & AI Agents: ultra-persistent memory, hybrid-retrieval, and cross-task skill reuse, with 35.24% token savings and DeepSeek Harness support. · GitHub

https://github.com/MemTensor/MemOS

Vendor Advisories for CVE-2026-75110(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 48× in last 7d / 205× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 234 total refreshes for this CVE.

  1. 2026-09-19 16:07 UTCEG score recompute
  2. 2026-09-19 16:07 UTCGHSA enrichment
  3. 2026-09-19 11:18 UTCGHSA enrichment
  4. 2026-09-19 06:54 UTCGHSA enrichment
  5. 2026-09-19 02:20 UTCGHSA enrichment
  6. 2026-09-18 21:56 UTCEG score recompute
  7. 2026-09-18 21:56 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 16:46 UTCGHSA enrichment
  10. 2026-09-18 11:07 UTCGHSA enrichment
  11. 2026-09-18 06:43 UTCGHSA enrichment
  12. 2026-09-18 02:19 UTCGHSA enrichment
  13. 2026-09-17 21:54 UTCEG score recompute
  14. 2026-09-17 21:54 UTCGHSA enrichment
  15. 2026-09-17 13:14 UTCGHSA enrichment
  16. 2026-09-17 08:08 UTCGHSA enrichment
  17. 2026-09-17 03:44 UTCGHSA enrichment
  18. 2026-09-16 23:05 UTCEG score recompute
  19. 2026-09-16 23:05 UTCGHSA enrichment
  20. 2026-09-16 15:15 UTCEG score recompute
  21. 2026-09-16 15:15 UTCGHSA enrichment
  22. 2026-09-16 14:08 UTCEPSS rescore
  23. 2026-09-16 10:46 UTCGHSA enrichment
  24. 2026-09-16 06:15 UTCEG score recompute
  25. 2026-09-16 06:15 UTCGHSA enrichment
Show 75 more
  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-16 01:51 UTCGHSA enrichment
  3. 2026-09-15 21:27 UTCGHSA enrichment
  4. 2026-09-15 16:08 UTCGHSA enrichment
  5. 2026-09-15 11:44 UTCGHSA enrichment
  6. 2026-09-15 05:54 UTCEG score recompute
  7. 2026-09-15 05:54 UTCGHSA enrichment
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-15 00:14 UTCGHSA enrichment
  10. 2026-09-14 19:50 UTCGHSA enrichment
  11. 2026-09-14 13:25 UTCGHSA enrichment
  12. 2026-09-14 09:01 UTCGHSA enrichment
  13. 2026-09-14 04:37 UTCGHSA enrichment
  14. 2026-09-14 00:13 UTCGHSA enrichment
  15. 2026-09-13 19:49 UTCEG score recompute
  16. 2026-09-13 19:49 UTCGHSA enrichment
  17. 2026-09-13 15:25 UTCGHSA enrichment
  18. 2026-09-13 11:01 UTCGHSA enrichment
  19. 2026-09-13 06:36 UTCGHSA enrichment
  20. 2026-09-13 02:12 UTCGHSA enrichment
  21. 2026-09-12 21:47 UTCGHSA enrichment
  22. 2026-09-12 17:22 UTCEG score recompute
  23. 2026-09-12 17:22 UTCGHSA enrichment
  24. 2026-09-12 15:02 UTCEPSS rescore
  25. 2026-09-12 12:58 UTCGHSA enrichment
  26. 2026-09-12 08:34 UTCGHSA enrichment
  27. 2026-09-12 04:09 UTCGHSA enrichment
  28. 2026-09-11 23:45 UTCGHSA enrichment
  29. 2026-09-11 18:23 UTCEG score recompute
  30. 2026-09-11 18:23 UTCGHSA enrichment
  31. 2026-09-11 14:53 UTCEPSS rescore
  32. 2026-09-11 13:58 UTCEG score recompute
  33. 2026-09-11 13:58 UTCGHSA enrichment
  34. 2026-09-11 09:32 UTCGHSA enrichment
  35. 2026-09-11 05:07 UTCGHSA enrichment
  36. 2026-09-11 00:43 UTCGHSA enrichment
  37. 2026-09-10 18:53 UTCGHSA enrichment
  38. 2026-09-10 14:26 UTCGHSA enrichment
  39. 2026-09-10 10:01 UTCEG score recompute
  40. 2026-09-10 10:01 UTCGHSA enrichment
  41. 2026-09-10 09:35 UTCEPSS rescore
  42. 2026-09-10 05:36 UTCGHSA enrichment
  43. 2026-09-10 01:12 UTCGHSA enrichment
  44. 2026-09-09 17:15 UTCGHSA enrichment
  45. 2026-09-09 12:27 UTCGHSA enrichment
  46. 2026-09-09 08:02 UTCGHSA enrichment
  47. 2026-09-09 03:38 UTCEG score recompute
  48. 2026-09-09 03:38 UTCGHSA enrichment
  49. 2026-09-08 22:01 UTCEPSS rescore
  50. 2026-09-08 05:44 UTCGHSA enrichment
  51. 2026-09-08 00:59 UTCGHSA enrichment
  52. 2026-09-07 20:35 UTCGHSA enrichment
  53. 2026-09-07 16:11 UTCEG score recompute
  54. 2026-09-07 16:11 UTCGHSA enrichment
  55. 2026-09-07 10:31 UTCGHSA enrichment
  56. 2026-09-07 05:31 UTCGHSA enrichment
  57. 2026-09-07 01:04 UTCGHSA enrichment
  58. 2026-09-06 20:24 UTCGHSA enrichment
  59. 2026-09-06 15:59 UTCEG score recompute
  60. 2026-09-06 15:59 UTCGHSA enrichment
  61. 2026-09-06 13:48 UTCEPSS rescore
  62. 2026-09-06 11:34 UTCGHSA enrichment
  63. 2026-09-06 07:10 UTCGHSA enrichment
  64. 2026-09-06 02:45 UTCGHSA enrichment
  65. 2026-09-05 22:20 UTCGHSA enrichment
  66. 2026-09-05 17:56 UTCEG score recompute
  67. 2026-09-05 17:56 UTCGHSA enrichment
  68. 2026-09-05 13:30 UTCGHSA enrichment
  69. 2026-09-05 09:02 UTCGHSA enrichment
  70. 2026-09-05 04:37 UTCGHSA enrichment
  71. 2026-09-05 00:13 UTCGHSA enrichment
  72. 2026-09-04 19:14 UTCGHSA enrichment
  73. 2026-09-04 14:50 UTCEG score recompute
  74. 2026-09-04 14:50 UTCGHSA enrichment
  75. 2026-09-04 10:24 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-75110?
CVE-2026-75110 is a critical vulnerability published on August 17, 2026. MemOS is a memory operating system for LLMs and AI agents. In deployments where authentication is enabled (AUTHENABLED=true) but the undocumented, defaultless INTERNALSERVICESECRET environment variable is unset, the isinternalrequest() check in src/memos/api/middleware/auth.py fails open:…
When was CVE-2026-75110 disclosed?
CVE-2026-75110 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75110 actively exploited?
CVE-2026-75110 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.1% of all scored CVEs.
What is the CVSS score of CVE-2026-75110?
CVE-2026-75110 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-75110?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75110, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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