CVE-2026-90896 Missing authentication in Ecommerce Template checkout session endpoint allows unauthenticated disclosure of buyer PII
Unauthenticated attackers can retrieve sensitive buyer PII from checkout sessions due to missing access controls in the API endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90896?
CVE-2026-90896 is a high-severity missing authorization vulnerability in MarcosCamara01 Ecommerce Template, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Missing Authentication for Critical Function (CWE-306) in the checkout session lookup handler (src/app/api/stripe/checkout_sessions/route.ts), exposed at GET /api/stripe/checkout_sessions, in MarcosCamara01 Ecommerce Template before commit 91e273c allows a remote, unauthenticated attacker holding a valid Stripe Checkout Session id (cs_...) to retrieve the full session object, including the buyer's name, email, phone, billing address, amount paid and internal userId, because the GET handler calls stripe.checkout.sessions.retrieve() and returns the result without checking for an authenticated session or session ownership. Sibling endpoints such as POST /api/stripe/payment already enforced authentication via auth.api.getSession(); this endpoint had no access control whatsoever. The session_id is exposed in the buyer's own browser URL after payment (success_url = /result?session_id={CHECKOUT_SESSION_ID}), so it leaks through Referer headers, analytics tools, server access logs and shared-machine browser history, resulting in disclosure of the buyer's personal data to an unauthenticated actor.
Weakness: CWE-306
Which versions are affected by CVE-2026-90896?
How do I fix CVE-2026-90896?
No fix has been published for CVE-2026-90896 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-90896 being exploited?
There is no known exploitation of CVE-2026-90896 in the wild and no public exploit code.
Sources
Also known as GHSA-qfqr-55gf-4v3j.