# 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.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 May 2026
- **Updated:** 20 May 2026
- **Also known as:** GHSA-pxmw-gj52-9p68

## 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.

Weakness: CWE-862 (Missing Authorization), CWE-284 (Improper Access Control)

## 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.

## Is CVE-2026-34358 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34358 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34358 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34358 exists.

Affected product: Ctrlpanel-gg panel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-34358/ (Markdown: https://insights.sbomify.com/CVE-2026-34358/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34358
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34358
- OSV: https://osv.dev/vulnerability/CVE-2026-34358

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-34358/
Summaries are generated and may contain mistakes; the official description above is the record.