Description
KTM System e-BOK allows the session identifier to be set by the client prior to authentication. If a cookie with a valid name is set, its value remains unchanged after successful login. This behaviour enables an attacker to fix a session ID for a victim and later hijack the authenticated session.
This issue was fixed in the patch published in June 2026.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| KTM System | e-BOK | < 06.2026 | 06.2026 |
References
- https://cert.pl/posts/2026/06/CVE-2026-35095/ third-party-advisory
- https://ktmsystem.pl/internetowe-biuro-obslugi-klienta/ product