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CVE-2026-55587

8.1 · HIGH

AliasVault is a privacy-first password manager with built-in email aliasing.

Published Oct 15, 2026CWE-346EPSS 0.15%

Overview

CVE-2026-55587 is a high-severity vulnerability. It was published on October 15, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/aliasvault/aliasvault/commit/a60d0966e66ecf4f6558dc40e3feb1313072ce2bGitHubgithub.com/aliasvault/aliasvault/releases/tag/0.29.4GitHubgithub.com/aliasvault/aliasvault/security/advisories/GHSA-f99p-jfhr-6ffc

How CyberStrike helps

Frequently asked questions

What is CVE-2026-55587?

CVE-2026-55587 is a high-severity vulnerability. It was published on October 15, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-55587?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-55587?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-55587?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-55587 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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