CVE-2026-78064 Missing authorization in J2Store extension for Joomla
Attackers can tamper with shopping cart records by exploiting missing authorization checks in the J2Store Joomla extension.
- 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-2026-78064?
CVE-2026-78064 is a high-severity missing authorization vulnerability in j2commerce.com J2Store extension for Joomla, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Joomla Extension - j2commerce.com - Anonymous cart-record tampering via inherited FOF `save` task in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - `fof.xml` grants the `carts` view's tasks a wildcard `true` ACL, and FOF only enforces CSRF tokens on back-end HTML requests, not on front-end `format=raw` requests. `J2StoreControllerCarts` already scoped `remove()` to the caller's own session, but never overrode the generic FOF `save` task, so it remained reachable to insert new cart rows with an attacker-chosen `user_id`/`session_id`, or overwrite an existing row by id.
Weakness: CWE-639
Which versions are affected by CVE-2026-78064?
How do I fix CVE-2026-78064?
No fix has been published for CVE-2026-78064 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-2026-78064 being exploited?
There is no known exploitation of CVE-2026-78064 in the wild and no public exploit code.
Sources
Also known as GHSA-jjf7-8pp5-x8vw.