CVE-2026-45690
Description
A flaw was found in Nextcloud Server. This vulnerability allows a remote attacker, with knowledge of a user's password, to bypass two-factor authentication (2FA) protections. When a user attempts to log in with valid credentials on a 2FA-enabled account, a temporary session token is generated before the second factor challenge. This token can be extracted and replayed using HTTP Basic Authentication, leading to unauthorized access to authenticated parts of the system.
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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