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 mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

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

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
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100CISA SSVC

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%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 17, 2026

Last Modified

September 24, 2026

Advisory Details (4)

Auto-updated Oct 9, 2026
🔬 Proof of concept available. No fix on record 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 29× in last 7d / 172× 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 338 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 on August 17, 2026, with the most recent update on September 24, 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 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75110?
CVE-2026-75110 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75110?
No fix for CVE-2026-75110 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-75110 are linked in the Vendor Advisories panel on this page.

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