CVE-2026-51584

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

An issue in usememos v0.27.1 allows a remote attacker to achieve account takeover via the ssoCredentials branch of the SignIn handler in server/router/api/v1/auth_service.go, because SSO identity is matched only on an attacker-controllable identifier without binding to the IdP's stable subject claim.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 12, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

GitHub - usememos/memos: Open-source, self-hosted note-taking tool built for quick capture. Markdown-native, lightweight, and fully yours. · GitHub

https://github.com/usememos/memos
generic🟡 PoC Available

CVE-2026-51584 · GitHub

https://gist.github.com/seiyaibuki0523/33a4c06eb7d10914e5e5152ecd5100ec

Vendor Advisories for CVE-2026-51584(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 53× in last 7d / 72× 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.

  1. 2026-08-21 05:36 UTCGHSA enrichment
  2. 2026-08-21 01:20 UTCEG score recompute
  3. 2026-08-21 01:20 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 21:04 UTCGHSA enrichment
  6. 2026-08-20 16:48 UTCGHSA enrichment
  7. 2026-08-20 12:22 UTCGHSA enrichment
  8. 2026-08-20 08:07 UTCGHSA enrichment
  9. 2026-08-20 03:51 UTCGHSA enrichment
  10. 2026-08-19 23:34 UTCGHSA enrichment
  11. 2026-08-19 19:18 UTCEG score recompute
  12. 2026-08-19 19:18 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 14:59 UTCGHSA enrichment
  15. 2026-08-19 10:42 UTCGHSA enrichment
  16. 2026-08-19 06:23 UTCGHSA enrichment
  17. 2026-08-19 01:55 UTCGHSA enrichment
  18. 2026-08-18 21:39 UTCGHSA enrichment
  19. 2026-08-18 17:24 UTCEG score recompute
  20. 2026-08-18 17:24 UTCGHSA enrichment
  21. 2026-08-18 13:48 UTCEPSS rescore
  22. 2026-08-18 12:45 UTCGHSA enrichment
  23. 2026-08-18 08:22 UTCGHSA enrichment
  24. 2026-08-18 03:48 UTCGHSA enrichment
  25. 2026-08-17 23:33 UTCGHSA enrichment
Show 47 more
  1. 2026-08-17 19:17 UTCGHSA enrichment
  2. 2026-08-17 14:35 UTCEG score recompute
  3. 2026-08-17 14:35 UTCGHSA enrichment
  4. 2026-08-17 13:47 UTCEPSS rescore
  5. 2026-08-17 10:18 UTCGHSA enrichment
  6. 2026-08-17 06:02 UTCGHSA enrichment
  7. 2026-08-17 01:41 UTCGHSA enrichment
  8. 2026-08-16 21:25 UTCGHSA enrichment
  9. 2026-08-16 17:09 UTCEG score recompute
  10. 2026-08-16 17:09 UTCGHSA enrichment
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 12:53 UTCGHSA enrichment
  13. 2026-08-16 08:37 UTCGHSA enrichment
  14. 2026-08-16 04:21 UTCEG score recompute
  15. 2026-08-16 04:21 UTCGHSA enrichment
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-16 00:05 UTCGHSA enrichment
  18. 2026-08-15 19:49 UTCGHSA enrichment
  19. 2026-08-15 15:33 UTCGHSA enrichment
  20. 2026-08-15 11:17 UTCGHSA enrichment
  21. 2026-08-15 07:01 UTCGHSA enrichment
  22. 2026-08-15 02:45 UTCEG score recompute
  23. 2026-08-15 02:45 UTCGHSA enrichment
  24. 2026-08-15 01:30 UTCEPSS rescore
  25. 2026-08-14 22:29 UTCGHSA enrichment
  26. 2026-08-14 18:13 UTCGHSA enrichment
  27. 2026-08-14 13:58 UTCGHSA enrichment
  28. 2026-08-14 09:42 UTCGHSA enrichment
  29. 2026-08-14 05:27 UTCGHSA enrichment
  30. 2026-08-14 01:11 UTCEG score recompute
  31. 2026-08-14 01:11 UTCGHSA enrichment
  32. 2026-08-13 22:00 UTCEPSS rescore
  33. 2026-08-13 20:55 UTCGHSA enrichment
  34. 2026-08-13 16:39 UTCGHSA enrichment
  35. 2026-08-13 12:22 UTCGHSA enrichment
  36. 2026-08-13 08:07 UTCGHSA enrichment
  37. 2026-08-13 03:50 UTCGHSA enrichment
  38. 2026-08-12 23:35 UTCEG score recompute
  39. 2026-08-12 23:35 UTCGHSA enrichment
  40. 2026-08-12 19:19 UTCGHSA enrichment
  41. 2026-08-12 18:31 UTCEG score recompute▲ 9.80
  42. 2026-08-12 18:31 UTCGHSA enrichment
  43. 2026-08-12 18:30 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  44. 2026-08-12 13:51 UTCEPSS rescore
  45. 2026-08-11 14:24 UTCNVD update
  46. 2026-08-11 14:03 UTCEG score recompute
  47. 2026-08-11 14:02 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51584?
CVE-2026-51584 is a critical vulnerability published on August 11, 2026. An issue in usememos v0.27.1 allows a remote attacker to achieve account takeover via the ssoCredentials branch of the SignIn handler in server/router/api/v1/auth_service.go, because SSO identity is matched only on an attacker-controllable identifier without binding to the IdP's stable subject…
When was CVE-2026-51584 disclosed?
CVE-2026-51584 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51584 actively exploited?
CVE-2026-51584 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 64.9% of all scored CVEs.
What is the CVSS score of CVE-2026-51584?
CVE-2026-51584 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51584?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51584, 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.

Dependency Blast Radius

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