CVE-2026-55370

MEDIUMPre-NVD 6.46.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (26th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-43011 (ENISA EUVD)Source: ENISA EUVD

6.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's existing TOTP verification accepted a successfully used TOTP code again while the code remained inside the RFC 6238 acceptance window because the verifier used otplib's stateless check with window = 1 and did not persist or compare the accepted TOTP time-step counter. An attacker who has the victim's first factor and captures a live TOTP value can replay that value to satisfy MFA during the same acceptance window. This issue is fixed in version 1.41.0.

CVSS v3
6.4
EG Score
6.4MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity64% × 45%
Impact severity (EG Severity): CVSS 6.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
26th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.4): severity, escalated by confirmed exploitation. This CVE's 6.4 is its impact severity (EG Severity), not escalated.

EG Severity
6.4 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 10, 2026

Last Modified

October 25, 2026

Advisory Details (4)

Auto-updated Jul 10, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

TOTP code can be replayed within the RFC 6238 acceptance window · Advisory · logto-io/logto · GitHub

https://github.com/logto-io/logto/security/advisories/GHSA-6wj7-c66m-6c82
GitHub release Patch Available

v1.41.0

Patch available: logto-io/logto v1.41.0

https://github.com/logto-io/logto/releases/tag/v1.41.0
GitHub pull request Patch Available

fix: prevent TOTP replay

Patch available: logto-io/logto v1.41.0 (PR #9109 merged 2026-06-30)

https://github.com/logto-io/logto/pull/9109
GitHub commit Patch Available

commit 9118867f6cba (logto-io/logto)

Patch available: logto-io/logto v1.41.0 (contains commit 9118867f6cba)

https://github.com/logto-io/logto/commit/9118867f6cbadc7291cf913beb4fede91ed5d374

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 155 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 55 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  3. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  5. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  7. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  8. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-10-25 14:19 UTCEG score recompute
  10. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  11. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  12. 2026-10-22 21:16 UTCEG score recompute
  13. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  14. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  17. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  18. 2026-10-18 03:30 UTCEG score recompute
  19. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  20. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  22. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-10-12 15:55 UTCEG score recompute
Show 75 more
  1. 2026-10-11 19:39 UTCEG score recompute
  2. 2026-10-11 16:54 UTCEG score recompute
  3. 2026-10-11 14:17 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-10-01 14:58 UTCEG score recompute
  16. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  17. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  18. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  19. 2026-09-28 09:46 UTCEG score recompute
  20. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  21. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  22. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  23. 2026-09-24 11:09 UTCEG score recompute
  24. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  25. 2026-09-23 05:44 UTCEG score recompute
  26. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  27. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  28. 2026-09-18 05:17 UTCEG score recompute
  29. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  30. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  31. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  32. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  33. 2026-09-14 06:59 UTCEG score recompute
  34. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  35. 2026-09-13 08:11 UTCEG score recompute
  36. 2026-09-12 02:50 UTCEG score recompute
  37. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  38. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  39. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  40. 2026-09-08 02:46 UTCEG score recompute
  41. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  42. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  43. 2026-09-05 21:40 UTCEG score recompute
  44. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  45. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  46. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  47. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  48. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  49. 2026-08-30 06:15 UTCEG score recompute
  50. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  51. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  52. 2026-08-28 02:38 UTCEG score recompute
  53. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  54. 2026-08-27 02:17 UTCEG score recompute
  55. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  56. 2026-08-26 03:33 UTCEG score recompute
  57. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  58. 2026-08-25 02:41 UTCEG score recompute
  59. 2026-08-23 04:29 UTCEG score recompute
  60. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  61. 2026-08-22 05:44 UTCEG score recompute
  62. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  63. 2026-08-21 06:59 UTCEG score recompute
  64. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  65. 2026-08-20 08:12 UTCEG score recompute
  66. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  67. 2026-08-19 09:27 UTCEG score recompute
  68. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  69. 2026-08-18 10:40 UTCEG score recompute
  70. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  71. 2026-08-17 09:32 UTCEG score recompute
  72. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  73. 2026-08-16 10:47 UTCEG score recompute
  74. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  75. 2026-08-15 12:03 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55370?
CVE-2026-55370 is a medium-severity vulnerability; its CVE record was published on July 10, 2026. Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's existing TOTP verification accepted a successfully used TOTP code again while the code remained inside the RFC 6238 acceptance window because the verifier used otplib's stateless check with window =…
When was the CVE record for CVE-2026-55370 published?
The CVE record for CVE-2026-55370 was published on July 10, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 25, 2026; the record at its source may have been updated since.
Is CVE-2026-55370 actively exploited?
CVE-2026-55370 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55370?
CVE-2026-55370 has a CVSS base score of 6.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55370?
A fix for CVE-2026-55370 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-55370

Explore →

Is Your Infrastructure Affected by CVE-2026-55370?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs