CVE-2026-43912

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.5, Vaultwarden does not enforce that a groups_users.users_organizations_uuid entry belongs to the same organization as groups.groups_uuid, or a collections_groups.collections_uuid entry belongs to the same organization as collections_groups.groups_uuid. Multiple organization group-management endpoints accept arbitrary MembershipId and CollectionId values and persist them directly without verifying org consistency. This lets an attacker who is Admin in Organization A, and only a low-privileged member in Organization B bind their Org B membership UUID into an Org A group, then use that foreign group relationship to gain unauthorized access to Org B vault data. With an accessAll=true Org A group, the attacker can make /api/sync and /api/ciphers enumerate Org B ciphers. Once those unauthorized sync results reveal Org B collection IDs, the attacker can also bind those foreign collection IDs to the Org A group and turn the same flaw into write access over Org B items. This vulnerability is fixed in 1.35.5.

• CWE-285

• https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-569v-845w-g82pExploit, Mitigation, Vendor Advisory
• https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-569v-845w-g82pExploit, Mitigation, Vendor Advisory

Published

May 11, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-43907OpenImageIO is a toolset for reading, writing, and manipulat…8.3
• CVE-2026-43908OpenImageIO is a toolset for reading, writing, and manipulat…8.8
• CVE-2026-43909OpenImageIO is a toolset for reading, writing, and manipulat…8.8
• CVE-2026-4391A security vulnerability has been detected in TeamSpeak 3 Se…6.9
• CVE-2026-43910Appium Java Client is the Java language binding for writing …8.2
• CVE-2026-43911Vaultwarden is a Bitwarden-compatible server written in Rust…8.1
• CVE-2026-43913Vaultwarden is a Bitwarden-compatible server written in Rust…8.1
• CVE-2026-43914Vaultwarden is a Bitwarden-compatible server written in Rust…9.8
• CVE-2026-43915Coturn is a free open source implementation of TURN and STUN…5.4
• CVE-2026-43916pam_authnft is a PAM session module binding nftables firewal…8.7
• CVE-2026-43917Dokploy is a free, self-hostable Platform as a Service (PaaS…5.3
• CVE-2026-43918FOSSBilling is a free, open-source billing and client manage…8.7