CVE-2026-67333

HIGHPre-NVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

Score 7.2 from GitHub Security Advisory published 2026-08-01. A secondary CVSS source baseline 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

better-auth before 1.6.13 (and pre-release builds 1.7.0-beta.0 through 1.7.0-beta.3) fail to validate the scheme of redirect_uris registered via the deprecated oidc-provider plugin and the mcp plugin (which wraps the same provider). An attacker can register an OAuth client with a javascript: redirect_uri, which the authorization server later returns unchanged in the consent response. If the deployment's consent page navigates the browser to the returned redirectURI (e.g. assigning it to window.location.href), the attacker's JavaScript executes in the authorization-server origin, exposing the victim's session and enabling account takeover.

CVSS v3
7.2
EG Score
7.2HIGHmedium confidence
EG Risk
48
EG Risk 48/100CISA 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
Severity72% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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 1.6.13 Stored XSS via javascript redirect_uri | Advisories | VulnCheck

https://www.vulncheck.com/advisories/better-auth-before-stored-xss-via-javascript-redirect-uri
github Patch Available

oidc-provider(deperecated): stored XSS in the auth-server origin via a javascript: redirect_uri in · Advisory · better-auth/better-auth · GitHub

https://github.com/better-auth/better-auth/security/advisories/GHSA-86j7-9j95-vpqj

Vendor Advisories for CVE-2026-67333(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 1.6.13: fixed in 1.6.13
  • 1.7.0-beta.0 up to 1.7.0-beta.4: fixed in 1.7.0-beta.4
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 82× 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 207 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-67333?
CVE-2026-67333 is a high vulnerability published on August 1, 2026. better-auth before 1.6.13 (and pre-release builds 1.7.0-beta.0 through 1.7.0-beta.3) fail to validate the scheme of redirecturis registered via the deprecated oidc-provider plugin and the mcp plugin (which wraps the same provider). An attacker can register an OAuth client with a javascript:…
When was CVE-2026-67333 disclosed?
CVE-2026-67333 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-2026-67333 actively exploited?
CVE-2026-67333 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67333?
CVE-2026-67333 has a CVSS base score of 7.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-67333?
A fix for CVE-2026-67333 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67333 are linked in the Vendor Advisories panel on this page.

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