What’s Vulnerable › Vulnerabilities
CVE-2026-18363: Weak password recovery mechanism in osTicket by Enhancesoft LLC
- Severity: critical (CVSS 9.1 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-30 · updated 2026-10-23
- Weakness: CWE-640
Description
A logic vulnerability in the password reset token validation routine implemented by osTicket in versions prior to v1.17.8 and v1.18.4. During the password reset process, the application retrieves the timestamp associated with the provided token and checks whether the configured validity period has expired. Consequently, the expiry check is only performed if the timestamp lookup fails, allowing tokens with an existing timestamp to bypass the intended expiry validation. Therefore, an attacker able to obtain a valid password reset token could reuse it to perform an unauthorised password reset and compromise the affected account.
Affected products
- Enhancesoft LLC osTicket: before 1.17.8; before 1.18.4 — fixed in 1.17.8, 1.18.4
How to fix
Upgrade to a fixed version: Enhancesoft LLC osTicket 1.17.8, 1.18.4. Check the vendor advisory for mitigations.
References
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