CVE-2026-67335

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-08-01. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

better-auth versions before 1.6.2 fail to validate the OAuth state parameter against the stored nonce when using cookie-backed state storage without PKCE. Attackers can forge the state parameter and supply an attacker-controlled authorization code to create authenticated sessions bound to the attacker's external identity or persistently link attacker accounts to victim profiles.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA 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
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 1, 2026

Last Modified

September 8, 2026

Advisory Details (2)

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

better-auth before 1.6.2 OAuth State Validation Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/better-auth-before-oauth-state-validation-bypass
github Patch Available

OAuth callback accepts mismatched `state` when cookie-backed state storage is used without PKCE · Advisory · better-auth/better-auth · GitHub

https://github.com/better-auth/better-auth/security/advisories/GHSA-wxw3-q3m9-c3jr

Vendor Advisories for CVE-2026-67335(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 rangeFix by version rangeDependents
better-auth—
  • every version up to 1.6.2: fixed in 1.6.2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 63× 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 162 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-67335?
CVE-2026-67335 is a medium vulnerability published on August 1, 2026. better-auth versions before 1.6.2 fail to validate the OAuth state parameter against the stored nonce when using cookie-backed state storage without PKCE. Attackers can forge the state parameter and supply an attacker-controlled authorization code to create authenticated sessions bound to the…
When was CVE-2026-67335 disclosed?
CVE-2026-67335 was first published 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-2026-67335 actively exploited?
CVE-2026-67335 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67335?
CVE-2026-67335 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-67335?
A fix for CVE-2026-67335 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67335 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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