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.
Metrics
Affected Vendors & Products
References
History
Tue, 16 Jun 2026 17:30:00 +0000
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| Metrics |
ssvc
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Tue, 16 Jun 2026 15:15:00 +0000
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| First Time appeared |
Enhancesoft
Enhancesoft osticket |
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| Vendors & Products |
Enhancesoft
Enhancesoft osticket |
Tue, 16 Jun 2026 13:15:00 +0000
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| Description | 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. | |
| Title | Session fixation vulnerability in Enhancesoft's osTicket | |
| Weaknesses | CWE-38 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: INCIBE
Published: 2026-06-16T11:47:56.882Z
Updated: 2026-06-16T16:18:10.713Z
Reserved: 2026-05-25T13:36:09.788Z
Link: CVE-2026-9507
Updated: 2026-06-16T16:18:06.428Z
Status : Deferred
Published: 2026-06-16T13:16:38.140
Modified: 2026-06-16T15:36:43.610
Link: CVE-2026-9507
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