AliasVault up to 0.29.3 Browser Extension input validation

Summaryinfo

A vulnerability classified as critical has been found in AliasVault up to 0.29.3. This vulnerability affects unknown code of the component Browser Extension. The manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2026-55587. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in AliasVault up to 0.29.3. This issue affects some unknown processing of the component Browser Extension. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

AliasVault is a privacy-first password manager with built-in email aliasing. Prior to 0.29.4, the AliasVault browser extension passkey provider does not bind passkey requests to the actual webpage origin or verify that the requested relying-party identifier matches the current website. A malicious website can provide forged origin and relying-party values and, if a victim with a matching stored passkey approves the AliasVault passkey prompt, obtain a valid assertion for a different website. Exploitation requires the extension to be installed, unlocked, and configured as a passkey provider, requires a stored passkey for the impersonated site, and cannot occur silently because the victim must approve the prompt. The server, web application, and mobile applications are not affected. This issue is fixed in version 0.29.4.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-55587 since 06/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 0.29.4 eliminates this vulnerability.

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Productinfo

Name

• AliasVault

Version

• 0.29.0
• 0.29.1
• 0.29.2
• 0.29.3

Website

• Product: https://github.com/aliasvault/aliasvault/

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