CVE-2026-45691

A flaw was found in Nextcloud Server. An attacker could reuse a pre-two-factor authentication 2FA session cookie as a Bearer token. This allows them to authenticate against DAV endpoints, granting unauthorized read and write access and bypassing the mandatory two-factor authentication. Mitigation...

CVE-2026-45691

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie created after successful password authentication but before TOTP completion could be reused as a Bearer token to authenticat...

CVE-2026-45691

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie created after successful password authentication but before TOTP completion could be reused as a Bearer token to authenticat...

CVE-2026-45691 Nextcloud: Bypass of second factor authentication on DAV endpoints

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie created after successful password authentication but before TOTP completion could be reused as a Bearer token to authenticat...

CVE-2026-45691

Summary: CVE-2026-45691 affects Nextcloud Server prior to 32.0.9 and 33.0.3, where a pre-2FA session cookie created after password auth but before TOTP could be reused as a Bearer token to access DAV endpoints, bypassing mandatory two-factor authentication and granting read/write access. Impact: ...

CVE-2026-45691 Nextcloud: Bypass of second factor authentication on DAV endpoints

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie created after successful password authentication but before TOTP completion could be reused as a Bearer token to authenticat...

NextCloud Server Authorization Issues Vulnerability

NextCloud Server is an open-source NextCloud server program developed by NextCloud. Versions of NextCloud Server from 32.0.0 to 32.0.9 and from 33.0.0 to 33.0.3 contained vulnerabilities related to authorization. These vulnerabilities stemmed from the possibility that the session cookie, which...

PT-2026-45535

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie created after successful password authentication but before TOTP completion could be reused as a Bearer token to authenticat...

CVE-2016-9468

Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.0.6 and 9.1.2 suffer from content spoofing in the dav app. The exception message displayed on the DAV endpoints contained partially user-controllable input leading to a potential misrepresentation of information...

Content-Spoofing in "dav" app - ownCloud

The exception message displayed on the DAV endpoints contained partially user-controllable input leading to a potential misrepresentation of information. Affected Software ownCloud Server 9.1.2 CVE-2016-???? core/96b8afe48570bc70088ccd8f897e9d71997d336e ownCloud Server 9.0.6 CVE-2016-????...

Server: Content-Spoofing in "dav" app

The exception message displayed on the DAV endpoints contained partially user-controllable input leading to a potential misrepresentation of information. For more information please consult the official advisory. This advisory is licensed CC BY-SA 4.0...