CVE-2026-55739 Crater - Missing Tenant-Ownership Check in CustomerPolicy Allows Cross-Company Customer Data Theft and Deletion
Attackers can access and delete customer data across different companies due to missing tenant-ownership checks in the CustomerPolicy.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-55739?
CVE-2026-55739 is a high-severity missing authorization vulnerability in crater-invoice Crater, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Crater isolates data per company_id, and its Invoice/Estimate/Payment/Expense policies enforce both a Bouncer ability check and ->hasCompany(->company_id). CustomerPolicy's view/update/delete methods omit the company-ownership check entirely, checking only the blanket ability. Route-model-bound customer lookups and the bulk Customer::deleteCustomers method are similarly unscoped (self::find with no company filter).
Weakness: CWE-639
Which versions are affected by CVE-2026-55739?
How do I fix CVE-2026-55739?
No fix has been published for CVE-2026-55739 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-2026-55739 being exploited?
There is no known exploitation of CVE-2026-55739 in the wild and no public exploit code.
Sources
Also known as GHSA-j2xj-x8wc-f6xg.