CVE-2026-27803 Vaultwarden: Collection Management Operations Allowed Without `manage` Verification for Manager Role
Attackers with collection access can perform unauthorized management operations despite lacking the manage permission, requiring an upgrade to Vaultwarden.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-27803?
CVE-2026-27803 is a high-severity missing authorization vulnerability in dani-garcia vaultwarden, published on 4 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, when a Manager has manage=false for a given collection, they can still perform several management operations as long as they have access to the collection. This issue has been patched in version 1.35.4.
Which versions are affected by CVE-2026-27803?
2 open source packages ship an affected version, including vaultwarden. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
vaultwarden crates.io | All versions | 1.35.4 |
vaultwarden crates.io | All versions | 1.35.4 |
Products include Dani-Garcia Vaultwarden.
How do I fix CVE-2026-27803?
Upgrade vaultwarden to 1.35.4 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-27803 being exploited?
There is no known exploitation of CVE-2026-27803 in the wild and no public exploit code.
Other vulnerabilities in dani-garcia vaultwarden
- CVE-2024-55225 Vaultwarden vulnerable to user impersonation
- CVE-2024-55224 Vaultwarden HTML injection vulnerability
- CVE-2024-39924 Privilege escalation in n/a
- CVE-2026-43912 Vaultwarden: Cross-Org Group Binding Enables Unauthorized Read And Write Access Into Another Organization
- CVE-2026-27802 Vaultwarden: Privilege Escalation via Bulk Permission Update to Unauthorized Collections by Manager
Sources
Also known as GHSA-h4hq-rgvh-wh27.