CVE-2026-67337

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-01. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

better-auth versions before 1.4.9 contain a two-factor authentication bypass vulnerability when session.cookieCache is enabled. Attackers with valid primary credentials can access authenticated routes without completing second-factor verification by exploiting premature session caching.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

August 1, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Aug 1, 2026
Patch available. Sources: github.
generic

better-auth before 1.4.9 Two-Factor Authentication Bypass via session.cookieCache | Advisories | VulnCheck

https://www.vulncheck.com/advisories/better-auth-before-two-factor-authentication-bypass-via-session-cookiecache
github Patch Available

Two-Factor Authentication Bypass via Premature Session Caching (session.cookieCache) · Advisory · better-auth/better-auth · GitHub

https://github.com/better-auth/better-auth/security/advisories/GHSA-xg6x-h9c9-2m83

Vendor Advisories for CVE-2026-67337(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
better-auth—1.4.9—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 75× 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 135 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-67337?
CVE-2026-67337 is a medium vulnerability published on August 1, 2026. better-auth versions before 1.4.9 contain a two-factor authentication bypass vulnerability when session.cookieCache is enabled. Attackers with valid primary credentials can access authenticated routes without completing second-factor verification by exploiting premature session caching.
When was CVE-2026-67337 disclosed?
CVE-2026-67337 was first published in the National Vulnerability Database on August 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-2026-67337 actively exploited?
CVE-2026-67337 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 80.7% of all scored CVEs.
What is the CVSS score of CVE-2026-67337?
CVE-2026-67337 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-67337?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67337, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-67337

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