CVE-2026-34737

AVideo: Arbitrary Stripe Subscription Cancellation via Debug Endpoint and retrieveSubscriptions() Bug

Any logged-in user can cancel arbitrary Stripe subscriptions belonging to other users. This causes direct financial damage to the platform operator (lost subscription revenue) and service disruption for paying subscribers who lose access to premium features. The debug endpoint should have been removed from production or restricted to admin-only access, and the retrieveSubscriptions() method should retrieve rather than cancel subscriptions.

• CWE-862: Missing Authorization
• Severity: Medium

The application does not perform an authorization check before performing a sensitive operation. Typical impact: unauthorized access to restricted functionality or data.

CVE-2026-34737 has a CVSS score of 6.5 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. No fixed version is listed yet, so configuration controls and monitoring matter more in the interim.

Kodem intelligence

Two changes are needed:

1. Restrict the debug endpoint to admins at plugin/StripeYPT/test.php:4:

// plugin/StripeYPT/test.php:4
if (!User::isAdmin())

Change User::isLogged() to User::isAdmin() so only administrators can access the debug endpoint.

2. Fix the retrieval bug at StripeYPT.php:933:

Remove the $sub->cancel() call from retrieveSubscriptions() so that the function only retrieves subscription data without cancelling it:

// StripeYPT.php:933 - remove the following line:
// $response = $sub->cancel();

The retrieveSubscriptions() method should retrieve subscription information, not cancel subscriptions as a side effect.

Found by aisafe.io

1. What is CVE-2026-34737? CVE-2026-34737 is a medium-severity missing authorization vulnerability in wwbn/avideo (composer), affecting versions <= 26.0. No fixed version is listed yet. The application does not perform an authorization check before performing a sensitive operation.
2. How severe is CVE-2026-34737? CVE-2026-34737 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of wwbn/avideo are affected by CVE-2026-34737? wwbn/avideo (composer) versions <= 26.0 is affected.
4. Is there a fix for CVE-2026-34737? No fixed version is listed for CVE-2026-34737 yet. Monitor the advisory for updates and apply mitigations in the interim.
5. Is CVE-2026-34737 exploitable, and should I be worried? Whether CVE-2026-34737 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-34737 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-34737? No fixed version is listed yet. In the interim: Keep the dependency up to date. Ensure authorization checks are enforced consistently on all sensitive operations.