Is CVE-2026-26266 actively exploited?

No active exploitation of CVE-2026-26266 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-26266 be exploited remotely?

Yes. CVE-2026-26266 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-26266?

CVE-2026-26266 has a CVSS score of 6.1 (MEDIUM).

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MEDIUM

CVE-2026-26266

CWE-79Published: March 3, 2026· Updated: Mar 5, 2026

6.1

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.5th

Official 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.[

NVD Source

Technical Analysis

CVE-2026-26266 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.