CVE-2026-67333

HIGHPre-NVD 7.27.2—
EchelonGraph scoreHIGH 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%CVSS: 7.2Exploit: None knownExposed: 0

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

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
7.2(high)
EG Risk
47(Track)
EG Risk 47/100SSVC: 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
Severity72% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

August 1, 2026

Last Modified

August 3, 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 rangeFixed inDependents
better-auth—1.7.0-beta.4—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 78× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 21:20 UTCGHSA enrichment
  3. 2026-08-20 08:36 UTCGHSA enrichment
  4. 2026-08-19 19:52 UTCEG score recompute
  5. 2026-08-19 19:51 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 07:06 UTCGHSA enrichment
  8. 2026-08-18 18:22 UTCEG score recompute
  9. 2026-08-18 18:22 UTCGHSA enrichment
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-18 04:19 UTCGHSA enrichment
  12. 2026-08-17 15:33 UTCEG score recompute
  13. 2026-08-17 15:33 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 02:49 UTCEG score recompute
  16. 2026-08-17 02:49 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 14:04 UTCEG score recompute
  19. 2026-08-16 14:04 UTCGHSA enrichment
  20. 2026-08-16 01:20 UTCGHSA enrichment
  21. 2026-08-15 12:36 UTCEG score recompute
  22. 2026-08-15 12:36 UTCGHSA enrichment
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-14 23:51 UTCGHSA enrichment
  25. 2026-08-14 11:07 UTCGHSA enrichment
Show 53 more
  1. 2026-08-13 22:23 UTCEG score recompute
  2. 2026-08-13 22:23 UTCGHSA enrichment
  3. 2026-08-13 22:00 UTCEPSS rescore
  4. 2026-08-13 09:38 UTCGHSA enrichment
  5. 2026-08-12 20:54 UTCEG score recompute
  6. 2026-08-12 20:54 UTCGHSA enrichment
  7. 2026-08-12 13:51 UTCEPSS rescore
  8. 2026-08-12 08:10 UTCGHSA enrichment
  9. 2026-08-11 19:26 UTCEG score recompute
  10. 2026-08-11 19:26 UTCGHSA enrichment
  11. 2026-08-11 06:42 UTCEG score recompute
  12. 2026-08-11 06:42 UTCGHSA enrichment
  13. 2026-08-11 00:00 UTCEPSS rescore
  14. 2026-08-10 17:58 UTCGHSA enrichment
  15. 2026-08-10 05:14 UTCGHSA enrichment
  16. 2026-08-09 16:30 UTCEG score recompute
  17. 2026-08-09 16:29 UTCGHSA enrichment
  18. 2026-08-09 13:47 UTCEPSS rescore
  19. 2026-08-09 03:45 UTCEG score recompute
  20. 2026-08-09 03:45 UTCGHSA enrichment
  21. 2026-08-08 16:37 UTCEPSS rescore
  22. 2026-08-08 15:01 UTCGHSA enrichment
  23. 2026-08-08 02:17 UTCEG score recompute
  24. 2026-08-08 02:17 UTCGHSA enrichment
  25. 2026-08-07 13:32 UTCGHSA enrichment
  26. 2026-08-07 00:48 UTCEG score recompute
  27. 2026-08-07 00:48 UTCGHSA enrichment
  28. 2026-08-06 13:47 UTCEPSS rescore
  29. 2026-08-06 12:04 UTCGHSA enrichment
  30. 2026-08-05 23:19 UTCEG score recompute
  31. 2026-08-05 23:19 UTCGHSA enrichment
  32. 2026-08-05 19:17 UTCEPSS rescore
  33. 2026-08-05 19:17 UTCEPSS rescore
  34. 2026-08-05 10:34 UTCGHSA enrichment
  35. 2026-08-04 21:49 UTCEG score recompute
  36. 2026-08-04 21:49 UTCGHSA enrichment
  37. 2026-08-04 15:10 UTCEPSS rescore
  38. 2026-08-04 10:39 UTCEPSS rescore
  39. 2026-08-04 09:04 UTCGHSA enrichment
  40. 2026-08-03 20:20 UTCEG score recompute
  41. 2026-08-03 20:20 UTCGHSA enrichment
  42. 2026-08-03 20:14 UTCEG score recompute
  43. 2026-08-03 20:14 UTCGHSA enrichment
  44. 2026-08-03 16:16 UTCEG score recompute
  45. 2026-08-03 16:16 UTCGHSA enrichment
  46. 2026-08-03 10:36 UTCEPSS rescore
  47. 2026-08-03 03:32 UTCGHSA enrichment
  48. 2026-08-02 14:47 UTCGHSA enrichment
  49. 2026-08-02 02:03 UTCEG score recompute
  50. 2026-08-02 02:03 UTCGHSA enrichment
  51. 2026-08-01 13:18 UTCEG score recompute
  52. 2026-08-01 12:43 UTCEG score recompute
  53. 2026-08-01 12:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 in the National Vulnerability Database on August 1, 2026, with the most recent update on August 3, 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% probability of exploitation in the next 30 days, which ranks it in the top 94.6% of all scored CVEs.
What is the CVSS score of CVE-2026-67333?
CVE-2026-67333 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-67333?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67333, 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-2026-67333

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