CVE-2026-41571 POC (Proof-of-Concept)

Note Mark is an open-source note-taking application. In version 0.19.2, IsPasswordMatch in backend/db/models.go falls back to a hard-coded bcrypt("null") placeholder whenever a user has no stored password. OIDC-registered users are created with an empty password, so anyone who submits password: "null" to the internal login endpoint receives a valid session for that user. The bypass is unauthenticated and requires no user interaction. This issue has been patched in version 0.19.3.

Published: 2026-05-04

CVSS: 9.4

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Download CVE-2026-41571 POC (Proof-of-Concept) here:

http://zeroday6mns52t72y3rsle7f72wca5uwn2xzktdysf72flozx7sv4mqd.onion/exploit-for-cve-2026-41571.772/

Tip: Download official Tor Browser at https://www.torproject.org/download/ to access .onion links.

https://hokyo.gr/poc-877-cve-2026-44129/

https://hokyo.gr/poc-545-cve-2026-20034/