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CVE-2026-9507— Session fixation vulnerability in Enhancesoft's osTicket

Quick assessment

Affected
Enhancesoft osTicket
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Enhancesoft osTicket是美国Enhancesoft公司开源的一套票务系统。 Enhancesoft osTicket 1.18.2版本存在安全漏洞，该漏洞源于会话固定攻击问题，可能导致攻击者在用户登录后通过保持初始会话标识符（OSTSESSID）有效，从而劫持受害者账户。

AI Predicted 8.1 Difficulty: Easy EPSS 0.62% · P48

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

Affected Version Matrix 1

VendorProduct Version RangeStatus
Enhancesoft osTicket 1.18.2 affected
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I. Basic Information for CVE-2026-9507

Vulnerability Information
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Vulnerability Title
Session fixation vulnerability in Enhancesoft's osTicket
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
路径遍历：’absolutepathnamehere’
Source: CVE Program / CVE List V5
Vulnerability Title
Enhancesoft osTicket 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Enhancesoft osTicket是美国Enhancesoft公司开源的一套票务系统。 Enhancesoft osTicket 1.18.2版本存在安全漏洞，该漏洞源于会话固定攻击问题，可能导致攻击者在用户登录后通过保持初始会话标识符（OSTSESSID）有效，从而劫持受害者账户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Enhancesoft osTicket 1.18.2 -

II. Public POCs for CVE-2026-9507

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III. Intelligence Information for CVE-2026-9507

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Vendor Advisories for CVE-2026-9507 (1)

IV. Related Vulnerabilities

Same product: osTicket
Same vendor: Enhancesoft

V. Comments for CVE-2026-9507

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