Is this vulnerability remotely exploitable?

Yes. Any attacker who can send an email to a victim's AliasVault alias can exploit this issue remotely, as long as the victim uses a vulnerable web client version and opens the malicious email.

What level of access does an attacker need to exploit this?

The attacker does not need authenticated access to AliasVault; the only requirement is the ability to deliver an email to a target alias. Exploitation occurs when an authenticated user views the crafted email in the vulnerable web client.

What is the safest general fix pattern for this type of issue?

The most robust fix pattern is to treat email HTML as untrusted data: sanitize it using a well-maintained HTML sanitizer, render it in a locked-down sandboxed iframe or separate origin, and avoid executing any scripts or inline event handlers originating from the email content.

Severity:

CRITICAL RISK

(9.3)

Stored Cross-Site Scripting (CWE-79) in AliasVault Web Client Email Renderer

CVE-2026-26266

Published:

Mar 3, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-78

CRITICAL RISK

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Remote Code Execution

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CWE-89

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Remote Code Execution via SQL Injection on the Database Server

March 7, 2026

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Stored Cross-Site Scripting leading to session hijacking and full account compromise

Severity:

CRITICAL RISK

(9.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Stored Cross-Site Scripting leading to session hijacking and full account compromise

Severity:

CRITICAL RISK

(9.3)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Stored Cross-Site Scripting (CWE-79) in AliasVault Web Client Email Renderer

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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