Session fixation vulnerability in Enhancesoft’s osTicket_CVE-2026-9507

5.1 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

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.

Basic Information

ID CVE-2026-9507

Source INCIBE

Published Jun 16, 2026 at 11:47

Modified Jun 16, 2026 at 11:50

Affected Product

Vendor Enhancesoft

Product osTicket

Version 1.18.2

Affected Versions Enhancesoft osTicket 1.18.2

CWE Classification

CWE-38

References

www.incibe.es /en/incibe-cert/notices/aviso/session-fixation-vulnerability-enhancesofts-osticket

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    "published": "2026-06-16T11:47:56.882Z",
    "modified": "2026-06-16T11:50:42.928Z",
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