CVE-2026-41427Disclosure(better-auth / better-auth\/oauth-provider)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.5, the clientPrivileges option documents a create action, but the OAuth client creation endpoints did not invoke the hook before persisting new clients. Deployments that configured clientPrivileges to restrict client registration were not actually restricted — any authenticated user could reach the create endpoints and register an OAuth client with attacker-chosen redirect URIs and metadata. This vulnerability is fixed in 1.6.5.

better-auth CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://github.com/better-auth/better-auth/security/advisories/GHSA-xr8f-h2gw-9xh6

Weakness type (CWE)

CWE-863

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

better-auth\/oauth-provider

Threat summary

2 mentions across 2 observed days
Momentum state: stable

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
Peaked 1d ago at 1 mentions (2026-04-24); latest day: 1
2 total mentions across 2 days

Affected systems

Vendors

better-auth

Products

better-auth\/oauth-provider

2 versions affected across 1 product

Deep dive

Activity timeline2 mentions / 2d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets3 URLs

By indicator

Full discourse2 posts

Vulmon Vulnerability Feed@VulmonFeeds167d
Disclosure
CVE-2026-41427 Unauthorized OAuth Client Registration in Better Auth Prior to 1.6.5 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-41427 Vulnerability Notification: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=3
Post summary
The tweet announces CVE‑2026‑41427, noting that Better Auth versions before 1.6.5 allow unauthorized OAuth client registration, and provides links to a vulnerability detail page and a notification.
0000047
4.0K followersView on X
CVE@CVEnew167d
Disclosure
CVE-2026-41427 Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.5, the clientPrivileges option documents a create action, but the OAuth client… https://www.cve.org/CVERecord?id=CVE-2026-41427
Post summary
The text discloses a weakness in Better Auth where, prior to v1.6.5, the clientPrivileges option lacks a documented create action, implying a potential privilege misconfiguration.
0000080
57.2K followersView on X

CPE platform detail4 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

4 of 4 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	better-auth	better-auth\/oauth-provider	-	node.js	-
App	better-auth	better-auth\/oauth-provider	1.4.8	node.js	-
App	better-auth	better-auth\/oauth-provider	1.4.8	node.js	-
App	better-auth	better-auth\/oauth-provider	1.7.0	node.js	-

Explore more

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