Memos CVE-2026-6634

Upgrade usememos memos to a version newer than 0.22.1 immediately. Check the project's official GitHub repository (https://github.com/usememos/memos) for the latest released version with authorization fixes applied. If a specific patched version number is not yet available in the project's releases, monitor the repository's release notes or security advisories for confirmation of a fix. As a temporary compensating control pending patching, restrict network access to the UpdateInstanceSetting endpoint and memos application to trusted internal IP addresses or VPN-only access, reducing the attack surface to authenticated users on the internal network; this does not eliminate the vulnerability but limits exposure to insider threats. Additionally, enforce strong authentication mechanisms (multi-factor authentication, single sign-on with centralized identity management) to reduce the likelihood that stolen or weak credentials enable unauthorized access. Monitor memos access logs for suspicious UpdateInstanceSetting API calls, particularly those modifying additionalStyle or additionalScript parameters by low-privilege accounts; any suspicious activity should trigger credential rotation for affected users. If patching is delayed, consider disabling the UpdateInstanceSetting feature entirely if it is not critical to operations, though this may require custom code modification. Do not rely solely on network segmentation; the primary mitigation is patching to a secure version.