CVE-2026-9507
A session fixation vulnerability has been identified in osTicket v1.18.2. This security flaw allows an attacker to hijack a victim’s account by keeping the initial session identifier (OSTSESSID) active after a successful login. The issue lies in the fact that the application does not invalidate the pre-authentication cookie or generate a new identifier for the authenticated context. As a result, if an attacker manages to set a known session identifier in the victim’s browser, they will be able to maintain unauthorised access to the account once the victim has authenticated.
- Score
- CVSS 4.0 5.1 Medium
- Status
- Deferred - cve-coordination@incibe.es
- Published
- 2026-06-16
- Last modified
- 2026-10-26
- Weaknesses
- CWE-38
Affected products
References
- https://www.incibe.es/en/incibe-cert/notices/aviso/session-fixation-vulnerability-enhancesofts-osticket
