CVE-2026-26266
CRITICALCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Lifecycle Timeline
3Tags
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.[
Analysis
Stored XSS in AliasVault password manager. Patch available.
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Remediation
Within 24 hours: Identify all instances of AliasVault Web Client in your environment and document versions in use. Within 7 days: Apply the available vendor patch to all AliasVault deployments and verify successful patching across all systems. …
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External POC / Exploit Code
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