Quick answers
- Is CVE-2026-9507 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-9507 being exploited in the wild.
- How severe is CVE-2026-9507?
- Informational severity, with a CVSS score of 5.1, published 16 June 2026.
- Which products and versions are affected?
- Enhancesoft osTicket 1.18.2.
- Is there a fix for CVE-2026-9507?
- 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-2026-9507 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-9507?
- Check whether you run Enhancesoft osTicket 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
A session fixation vulnerability exists in osTicket v1.18.2 due to the application's failure to invalidate the pre-authentication session cookie or rotate the session identifier upon successful user authentication. An attacker can exploit this by pre-setting a known OSTSESSID in a victim's browser (e.g., via CRLF injection or physical access). Once the victim authenticates using that fixed session ID, the attacker can use the same identifier to gain unauthorized access to the authenticated session. The vendor has indicated that the legacy codebase is in maintenance mode with delayed security updates as they focus on a version 2.0 rewrite.
Affected products
- Enhancesoft osTicket 1.18.2
Timeline
- 2026-06-16: disclosed
- 2026-06-16: advisory