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VulnerabilityPublished Updated

CVE-2026-55587: aliasvault · Origin Validation Error

Affects aliasvaultSource CVE Database V5

0

Not known to be exploited · CVSS 8.1 High : upgrade to 0.29.4 soon.

Data as of 28 Oct 2026, 20:29 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Total control over the software or total information disclosure

CISA SSVC assessment, 2026-10-28.

Patch
Available – fixed in 0.29.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade aliasvault and aliasvault/aliasvault to 0.29.4.

Affected software

ProductAffectedFixed in
aliasvaultaliasvaultAffected
  • <0.29.4
Fixed in
  • 0.29.4
GitHubaliasvault/aliasvaultpkg:github/aliasvault/aliasvaultOther threatsAffected
  • <0.29.4
Fixed in
  • 0.29.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should update the AliasVault browser extension to version 0.29.4 or later, where this origin validation issue is fixed. Since the vulnerability requires user approval of the passkey prompt, educating users to be cautious about unexpected passkey requests can also help mitigate risk. No other action is required as the vulnerability is patched.

Description

AliasVault browser extension versions prior to 0.29.4 have a vulnerability where passkey requests are not properly bound to the actual webpage origin or verified against the relying-party identifier. This allows a malicious website to forge these values and, with user approval, obtain a valid passkey assertion for a different site. Exploitation requires the extension to be installed, unlocked, configured as a passkey provider, and the victim to have a stored passkey for the impersonated site. The issue is fixed in version 0.29.4.

References

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