CVE-2026-67329 @better-auth/stripe before 1.6.21 Authorization Bypass via Organization Subscription

What is CVE-2026-67329?

CVE-2026-67329 is a high-severity missing authorization vulnerability in better-auth stripe, published on 1 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

@better-auth/stripe versions >= 1.4.11 and < 1.6.21, and >= 1.7.0-beta.0 and < 1.7.0-beta.10, contain an authorization bypass in organization subscription actions. The middleware validates the organization ID taken from the request query string against the authorizeReference callback, but the handler reads the organization ID only from the request body and falls back to the caller's active organization from their session. When these differ, an authenticated member of multiple organizations can perform subscription actions (cancel, change plan, restore, billing portal access) against an organization they belong to but should not manage, and can access another organization's billing details including payment methods, invoices, and subscription state.

Weakness: CWE-639

Which versions are affected by CVE-2026-67329?

4 open source packages ship an affected version, including @better-auth/stripe.

How do I fix CVE-2026-67329?

Upgrade @better-auth/stripe to a fixed version for your release line: 1.6.21 or 1.7.0-beta.10.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-67329 being exploited?

There is no known exploitation of CVE-2026-67329 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as GHSA-h3rm-78g3-j7cp, GHSA-mp8j-p2mc-4hgv.