CVE-2026-26266

CRITICAL

9.3

Description

AliasVault is a privacy-first password manager with built-in email aliasing. A stored cross-site scripting (XSS) vulnerability was identified in the email rendering feature of AliasVault Web Client versions 0.25.3 and lower. When viewing received emails on an alias, the HTML content is rendered in an iframe using srcdoc, which does not provide origin isolation. An attacker can send a crafted email containing malicious JavaScript to any AliasVault email alias. When the victim views the email in the web client, the script executes in the same origin as the application. No sanitization or sandboxing was applied to email HTML content before rendering. This vulnerability is fixed in 0.26.0.[

CVE Details

CVSS v3.1 Score9.3

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published3/3/2026

Last Modified3/5/2026

Sourcenvd

Honeypot Sightings0

Affected Products

aliasvault:aliasvault

Weaknesses (CWE)

CWE-79

References

https://github.com/aliasvault/aliasvault/commit/382e2e96fa502891638a48404f6d82dc972ab481(security-advisories@github.com)

https://github.com/aliasvault/aliasvault/releases/tag/0.26.0(security-advisories@github.com)

https://github.com/aliasvault/aliasvault/security/advisories/GHSA-f65p-p65r-g53q(security-advisories@github.com)

IOC Correlations

No correlations recorded

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