CVE-2026-43639

Published: Mag 11, 2026 Last Modified: Mag 11, 2026

ExploitDB:

Other exploit source:

Google Dorks:

HIGH 8,9

Source: [email protected]

Attack Vector: network

Attack Complexity: high

Privileges Required: high

User Interaction: none

Confidentiality: N/A

Integrity: N/A

Availability: N/A

HIGH 8,0

Source: [email protected]

Attack Vector: network

Attack Complexity: high

Privileges Required: high

User Interaction: none

Scope: changed

Confidentiality: high

Integrity: high

Availability: high

Description

AI Translation Available

Bitwarden Server prior to v2026.4.0 contains a missing authorization vulnerability that allows a provider service user to add an arbitrary organization to their provider via `POST /providers/{providerId}/clients/existing`, resulting in takeover of the target organization; self-hosted installations are unaffected as this endpoint is restricted to Cloud via SelfHosted(NotSelfHostedOnly = true).

862

Missing Authorization

Incomplete

Abstraction: Class Structure: Simple

Common Consequences

Security Scopes Affected:

Confidentiality Integrity Access Control Availability

Potential Impacts:

Read Application Data Read Files Or Directories Modify Application Data Modify Files Or Directories Gain Privileges Or Assume Identity Bypass Protection Mechanism Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Resource Consumption (Other)