Quick answers
- Is CVE-2026-91107 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91107 being exploited in the wild.
- How severe is CVE-2026-91107?
- Informational severity, published 5 October 2026.
- Which products and versions are affected?
- OS4ED openSIS Classic 9.3.
- Is there a fix for CVE-2026-91107?
- 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-2026-91107 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-91107?
- Check whether you run OS4ED openSIS Classic 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
An insecure direct object reference (IDOR) in the School Information update path allows an authenticated user with the teacher role to specify an arbitrary staff_id parameter and reset that staff member's password. The vulnerability requires valid authentication and intentional manipulation of object references, but does not validate that the requesting user has authorization to modify the target staff record.
Affected products
- OS4ED openSIS Classic 9.3