Is CVE-2026-90856 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-90856 being exploited in the wild.

How severe is CVE-2026-90856?

High severity, with a CVSS score of 7.3, published 15 September 2026.

Is there a fix for CVE-2026-90856?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-90856 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-90856?

Check whether you run SourceCodester College Notes Gallery Management System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-90856: SourceCodester College Notes Gallery Management System privilege escalation in signup

CVE-2026-90856 · Severity: high · CVSS 7.3 · Published 2026-09-15

College Notes Gallery Management System is a web application for managing academic notes and course materials. A flaw in the user registration process allows unauthenticated attackers to create administrative accounts by manipulating the role parameter, gaining full control over the system including user management and content approval functions.

Technologies: SourceCodester College Notes Gallery Management System. Vendors: SourceCodester.

Quick answers

Is CVE-2026-90856 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-90856 being exploited in the wild.
How severe is CVE-2026-90856?: High severity, with a CVSS score of 7.3, published 15 September 2026.
Which products and versions are affected?: SourceCodester College Notes Gallery Management System 1.0.
Is there a fix for CVE-2026-90856?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-90856 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-90856?: Check whether you run SourceCodester College Notes Gallery Management System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This is a broken access control vulnerability in the signup.php registration endpoint. The backend directly trusts and stores the client-supplied role parameter without server-side validation or allowlist checking. Although the frontend only presents "teacher" and "student" options, an unauthenticated attacker can intercept the signup POST request and modify the role field to "admin" to create a privileged account. No authentication or authorization checks are enforced during registration. An attacker can then log in with the newly created admin account and access all administrative functions, including user management, note approval, and system configuration. The vulnerability is trivial to exploit and requires no preconditions beyond network access to the signup page.

Affected products

SourceCodester College Notes Gallery Management System 1.0

Timeline

2026-08-13: disclosed: Vulnerability disclosed on GitHub
2026-09-15: advisory: CVE-2026-90856 published

References

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