CVE-2026-45691
Description
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.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Frequently Asked Questions
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