CVE-2026-34358 CtrlPanel: Missing Authorization on Admin Write Endpoints Allows RBAC Bypass
Authenticated users can bypass RBAC to modify admin data and escalate privileges due to missing authorization checks on write endpoints.
- 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-2026-34358?
CVE-2026-34358 is a high-severity missing authorization vulnerability in Ctrlpanel-gg panel, published on 19 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
CtrlPanel is open-source billing software for hosting providers. Versions 1.1.1 and prior contains a broken access control vulnerability where multiple admin controllers enforce permission checks on form display methods but omit equivalent checks on the corresponding write methods, allowing any authenticated user to bypass RBAC via direct POST/PATCH requests. Controllers missing checks on write methods store() and update() include ApplicationApiController (admin.api.write), CouponController (admin.coupons.write), PartnerController (admin.partners.write), ShopProductController (admin.store.write), UsefulLinkController (admin.useful_links.write), and VoucherController (admin.voucher.write); ProductController (admin.products.edit), ServerController (write/change_owner/change_identifier), and UserController (write/change_email/change_credits/change_username/change_password/change_role/change_referral/change_ptero/change_serverlimit) are missing checks on update() only, and ActivityLogController exposed empty stub store()/update() methods that silently accepted any request. An authenticated attacker without admin write privileges can issue API credentials, generate unlimited coupons and vouchers, assign arbitrary partner commission and discount rates, alter shop product pricing and limits, reassign server ownership or identifiers, and modify user accounts including roles, credits, passwords, and linked Pterodactyl IDs to achieve full privilege escalation, as well as abuse logBackIn() without the login_as permission to interfere with admin impersonation sessions. This issue has been fixed in version 1.2.0.
Which versions are affected by CVE-2026-34358?
How do I fix CVE-2026-34358?
No fix has been published for CVE-2026-34358 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-2026-34358 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34358 exists.
Sources
Also known as GHSA-pxmw-gj52-9p68.