---
title: "AliasVault - Authentication Bypass"
description: "AliasVault browser extension < 0.29.4 contains an authentication bypass caused by lack of origin and relying-party identifier verification in passkey requests, letting attackers obtain valid assertions for different websites, exploit requires extension installed, unlocked, configured, and user approval."
url: https://panop.io/threat-heartbeat/CVE-2026-55587/
---

# CVE-2026-55587 AliasVault - Authentication Bypass

AliasVault browser extension < 0.29.4 contains an authentication bypass caused by lack of origin and relying-party identifier verification in passkey requests, letting attackers obtain valid assertions for different websites, exploit requires extension installed, unlocked, configured, and user approval.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-55587)

## Details

Type

Broken Authentication

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Published

15 October 2026

Updated

16 October 2026

Weakness

[CWE-346](https://cwe.mitre.org/data/definitions/346.html)

## Vendor fix

Update to version 0.29.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-55587](https://nvd.nist.gov/vuln/detail/CVE-2026-55587)
- [https://github.com/aliasvault/aliasvault/commit/a60d0966e66ecf4f6558dc40e3feb1313072ce2b](https://github.com/aliasvault/aliasvault/commit/a60d0966e66ecf4f6558dc40e3feb1313072ce2b)
- [https://github.com/aliasvault/aliasvault/releases/tag/0.29.4](https://github.com/aliasvault/aliasvault/releases/tag/0.29.4)
- [https://github.com/aliasvault/aliasvault/security/advisories/GHSA-f99p-jfhr-6ffc](https://github.com/aliasvault/aliasvault/security/advisories/GHSA-f99p-jfhr-6ffc)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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