CVE-2026-88065 `tts-be` application has a Broken Access Control vulnerability
Remote attackers can bypass authorization to extract sensitive student PII and use the backend as an open proxy.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-88065?
CVE-2026-88065 is a high-severity missing authorization vulnerability in NIAEFEUP tts-be, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
`tts-be` is a backend for a timetable selector that aims to help students better choose their class schedules. Versions prior to 2.1.0 have a Broken Access Control vulnerability across several API endpoints (such as `/api/student/{id}/photo` and `/api/course_unit/{id}/exchange/metadata`). By chaining these unauthenticated endpoints, a remote attacker can use the backend as an open proxy to bypass authorization checks, allowing for the enumeration and extraction of sensitive Personally Identifiable Information (PII) from upstream university systems. The exposed data includes full names, student IDs, class schedules, and photos. This issue was fixed in version 2.1.0.
Which versions are affected by CVE-2026-88065?
How do I fix CVE-2026-88065?
No fix has been published for CVE-2026-88065 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-2026-88065 being exploited?
There is no known exploitation of CVE-2026-88065 in the wild and no public exploit code.
Sources
Also known as GHSA-fpfp-hr42-fvpm.