VulnSocial

CVE-2026-53515Disclosure(better-auth / better-auth\/sso)

LOWCVSS 7.1 · HIGH

Signal is active with 2 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. From 1.2.10 until 1.6.11, the @better-auth/sso plugin's POST /sso/register endpoint lets any organization member attach a new SSO provider to that organization because registerSSOProvider checks only for a membership row and does not require an owner or admin role, allowing attacker-controlled OIDC or SAML providers to drive /sso/callback/{providerId} organization provisioning. This issue is fixed in version 1.6.11.

better-auth CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-269CWE-285CWE-863

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

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

  • better-auth\/sso
  • better_auth

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Affected systems

Vendors
better-auth
Products
better-auth\/ssobetter_auth

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-07-15: 2Technical Details · 2026-07-15: 207-15
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-53515 Better Auth is an authentication and authorization library for TypeScript. From 1.2.10 until 1.6.11, the @better-auth/sso plugin's POST /sso/register endpoint lets an… https://www.cve.org/CVERecord?id=CVE-2026-53515 ----- Traducción: CVE-2026-53515 Bet… http://infoflow.cloud`

    Post summary

    A brief CVE announcement for CVE‑2026‑53515, impacting @better‑auth/sso from versions 1.2.10 to 1.6.11 via the POST /sso/register endpoint, with no evidence of active exploitation, PoC, or patch.

    0000032
    92 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-53515 Better Auth is an authentication and authorization library for TypeScript. From 1.2.10 until 1.6.11, the @better-auth/sso plugin's POST /sso/register endpoint lets an… https://www.cve.org/CVERecord?id=CVE-2026-53515

    Post summary

    This entry announces CVE-2026-53515, describing a vulnerability in the @better-auth/sso plugin that allows exploitation via the POST /sso/register endpoint across certain versions.

    00000630
    57.8K followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Appbetter-authbetter-auth\/sso-node.js-
Appbetter-authbetter_auth-node.js-

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