Disclosure summary
CVE-2026-45690 is a medium-severity CWE-287 vulnerability in Nextcloud Server. Temporary session tokens can bypass two-factor authentication. Cantina reproduced the behavior, verified its security impact, and coordinated disclosure with the affected maintainer.
Verification standard
Cantina publishes a disclosure only after reproducing the behavior, validating its security impact, and coordinating remediation with the affected project.