CVE-2026-18363 Weak password recovery mechanism in osTicket by Enhancesoft LLC
Attackers can reuse expired password reset tokens to take over accounts due to flawed expiry validation logic in osTicket.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18363?
CVE-2026-18363 is a critical vulnerability in Enhancesoft LLC osTicket, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-640
Which versions are affected by CVE-2026-18363?
How do I fix CVE-2026-18363?
No fix has been published for CVE-2026-18363 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18363 being exploited?
There is no known exploitation of CVE-2026-18363 in the wild and no public exploit code.
Sources
Also known as GHSA-h2gf-gwxr-4pm4.