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                  1. Support
                  2. Prusa Pro HT90
                  3. Changelog

                  Prusa Pro HT90 Changelog

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                  Version 1.3.56

                  04.06.2026

                  New features:

                  • Firmware image vendor-signed to prevent a malicious 3rd-party firmware attack vector 

                  Fixed Bugs:

                  • Reduced USB filesystem privileges to eliminate a potential attack vector
                  • Reduced privileges of Klipper components to eliminate potential attack vectors
                  • Removed unused source code stubs to eliminate potential attack vectors
                  • Printer REST API sanitized against potential malicious code injection
                  • Service SSH access removed
                  • Printer name validation by RFC 1123 fixed

                  Documents:

                  • Security content of Prusa Pro HT90 firmware 1.3.56, Advisory ID: PSA-2026-001

                  Contents

                  • Version 1.3.56