A logic vulnerability in the password reset token validation routine implemented by osTicket in versions prior to v1.17.8 and v1.18.4. (CVE-2026-18363)
A logic vulnerability exists in the password reset token validation routine of osTicket versions prior to v1.17.8 and v1.18.4. The flaw causes the expiry check on password reset tokens to be bypassed if the token's timestamp is found, allowing reuse of valid tokens beyond their intended validity period. This enables an attacker who obtains a valid token to perform unauthorized password resets and compromise user accounts.
AI Analysis
Technical Summary
The vulnerability in osTicket's password reset process arises because the application only performs the expiry check if the timestamp lookup for the token fails. If the timestamp exists, the expiry validation is skipped, allowing tokens to be reused after their intended expiration. This logic flaw affects versions prior to v1.17.8 and v1.18.4. An attacker with access to a valid reset token can exploit this to reset passwords without authorization, leading to account compromise.
Potential Impact
An attacker able to obtain a valid password reset token can reuse it indefinitely due to the bypassed expiry check, enabling unauthorized password resets and potential account takeover. This compromises the confidentiality and integrity of affected user accounts.
Mitigation Recommendations
A fix is available in osTicket versions v1.17.8 and v1.18.4 that corrects the token expiry validation logic. Users should upgrade to these or later versions to remediate the vulnerability. Patch status is not explicitly confirmed beyond these versions; verify with the vendor advisory for the latest remediation guidance.
A logic vulnerability in the password reset token validation routine implemented by osTicket in versions prior to v1.17.8 and v1.18.4. (CVE-2026-18363)
Description
A logic vulnerability exists in the password reset token validation routine of osTicket versions prior to v1.17.8 and v1.18.4. The flaw causes the expiry check on password reset tokens to be bypassed if the token's timestamp is found, allowing reuse of valid tokens beyond their intended validity period. This enables an attacker who obtains a valid token to perform unauthorized password resets and compromise user accounts.
CVSS v4.0
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in osTicket's password reset process arises because the application only performs the expiry check if the timestamp lookup for the token fails. If the timestamp exists, the expiry validation is skipped, allowing tokens to be reused after their intended expiration. This logic flaw affects versions prior to v1.17.8 and v1.18.4. An attacker with access to a valid reset token can exploit this to reset passwords without authorization, leading to account compromise.
Potential Impact
An attacker able to obtain a valid password reset token can reuse it indefinitely due to the bypassed expiry check, enabling unauthorized password resets and potential account takeover. This compromises the confidentiality and integrity of affected user accounts.
Mitigation Recommendations
A fix is available in osTicket versions v1.17.8 and v1.18.4 that corrects the token expiry validation logic. Users should upgrade to these or later versions to remediate the vulnerability. Patch status is not explicitly confirmed beyond these versions; verify with the vendor advisory for the latest remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-h2gf-gwxr-4pm4
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-18363"]
- Ecosystems
- []
- Database Specific Severity
- CRITICAL
- Cvss Version
- 4.0
Threat ID: 6a6b72b29c2644c7f84725a8
Added to database: 07/30/2026, 15:50:10 UTC
Last enriched: 07/30/2026, 20:10:58 UTC
Last updated: 07/31/2026, 02:51:54 UTC
Views: 2
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