CVE-2026-84203

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-01. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

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

Memos versions 0.26.0 through 0.30.0 fail to revoke refresh tokens when a user changes their password, allowing attackers to maintain account access. An attacker with a stolen refresh token can call the RefreshToken RPC to obtain new access tokens and rotate the refresh token indefinitely, bypassing the password change security measure.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 8, 2026

Advisory Details (4)

Auto-updated Sep 1, 2026
No patch confirmed yet.
generic

Memos 0.26.0 through 0.30.0 Insufficient Session Expiration on Password Change | Advisories | VulnCheck

https://www.vulncheck.com/advisories/memos-0.26.0-through-0.30.0-insufficient-session-expiration-on-password-change
generic

memos/server/auth/authenticator.go at v0.30.0 · usememos/memos · GitHub

https://github.com/usememos/memos/blob/v0.30.0/server/auth/authenticator.go
generic

memos/server/router/api/v1/user_service.go at v0.30.0 · usememos/memos · GitHub

https://github.com/usememos/memos/blob/v0.30.0/server/router/api/v1/user_service.go
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

Vendor Advisories for CVE-2026-84203(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 27× in last 7d / 71× 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. 2026-09-19 16:42 UTCEG score recompute
  2. 2026-09-19 16:42 UTCGHSA enrichment
  3. 2026-09-19 04:30 UTCEG score recompute
  4. 2026-09-19 04:30 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 16:17 UTCGHSA enrichment
  7. 2026-09-18 03:28 UTCEG score recompute
  8. 2026-09-18 03:28 UTCGHSA enrichment
  9. 2026-09-17 19:32 UTCEPSS rescore
  10. 2026-09-17 15:16 UTCGHSA enrichment
  11. 2026-09-17 03:04 UTCGHSA enrichment
  12. 2026-09-16 14:31 UTCEG score recompute
  13. 2026-09-16 14:31 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 02:19 UTCGHSA enrichment
  17. 2026-09-15 14:07 UTCEG score recompute
  18. 2026-09-15 14:07 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-15 01:54 UTCGHSA enrichment
  22. 2026-09-14 13:42 UTCGHSA enrichment
  23. 2026-09-14 01:17 UTCEG score recompute
  24. 2026-09-14 01:17 UTCGHSA enrichment
  25. 2026-09-13 13:05 UTCGHSA enrichment
Show 46 more
  1. 2026-09-13 00:53 UTCEG score recompute
  2. 2026-09-13 00:53 UTCGHSA enrichment
  3. 2026-09-12 12:41 UTCGHSA enrichment
  4. 2026-09-12 00:29 UTCEG score recompute
  5. 2026-09-12 00:29 UTCGHSA enrichment
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 12:17 UTCEG score recompute
  9. 2026-09-11 12:16 UTCGHSA enrichment
  10. 2026-09-11 00:03 UTCGHSA enrichment
  11. 2026-09-10 11:49 UTCEG score recompute
  12. 2026-09-10 11:49 UTCGHSA enrichment
  13. 2026-09-09 23:37 UTCGHSA enrichment
  14. 2026-09-09 09:04 UTCEG score recompute
  15. 2026-09-09 09:04 UTCGHSA enrichment
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-08 20:51 UTCGHSA enrichment
  18. 2026-09-08 11:00 UTCGHSA enrichment
  19. 2026-09-07 22:20 UTCEG score recompute
  20. 2026-09-07 22:20 UTCGHSA enrichment
  21. 2026-09-07 10:07 UTCGHSA enrichment
  22. 2026-09-06 21:51 UTCEG score recompute
  23. 2026-09-06 21:50 UTCGHSA enrichment
  24. 2026-09-06 13:48 UTCEPSS rescore
  25. 2026-09-06 09:35 UTCGHSA enrichment
  26. 2026-09-05 21:22 UTCEG score recompute
  27. 2026-09-05 21:22 UTCGHSA enrichment
  28. 2026-09-05 15:31 UTCEPSS rescore
  29. 2026-09-05 09:10 UTCGHSA enrichment
  30. 2026-09-04 20:58 UTCEG score recompute
  31. 2026-09-04 20:57 UTCGHSA enrichment
  32. 2026-09-04 08:40 UTCEG score recompute
  33. 2026-09-04 08:40 UTCGHSA enrichment
  34. 2026-09-04 05:07 UTCEPSS rescore
  35. 2026-09-03 20:25 UTCGHSA enrichment
  36. 2026-09-03 08:13 UTCGHSA enrichment
  37. 2026-09-02 20:00 UTCEG score recompute
  38. 2026-09-02 20:00 UTCGHSA enrichment
  39. 2026-09-02 14:12 UTCEPSS rescore
  40. 2026-09-02 07:43 UTCGHSA enrichment
  41. 2026-09-01 19:30 UTCEG score recompute
  42. 2026-09-01 19:29 UTCGHSA enrichment
  43. 2026-09-01 18:24 UTCEG score recompute
  44. 2026-09-01 16:25 UTCEG score recompute
  45. 2026-09-01 15:44 UTCEG score recompute
  46. 2026-09-01 15:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84203?
CVE-2026-84203 is a high vulnerability published on September 1, 2026. Memos versions 0.26.0 through 0.30.0 fail to revoke refresh tokens when a user changes their password, allowing attackers to maintain account access. An attacker with a stolen refresh token can call the RefreshToken RPC to obtain new access tokens and rotate the refresh token indefinitely,…
When was CVE-2026-84203 disclosed?
CVE-2026-84203 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84203 actively exploited?
CVE-2026-84203 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 82.5% of all scored CVEs.
What is the CVSS score of CVE-2026-84203?
CVE-2026-84203 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-84203?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84203, 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

Explore the affected products and dependency analysis for CVE-2026-84203

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