CVE-2026-9507 — Session fixation vulnerability in Enhancesoft's osTicket
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 ident…
Published: 2026-06-16 · CVSS: 5.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7