CVE-2026-26266

March 4, 2026, 6:08 p.m.

9.3
Critical

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.[

Product(s) Impacted

Vendor Product Versions
Aliasvault
  • Aliasvault
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a aliasvault aliasvault / <0.26.0>* / / / / /

References

https://github.com/aliasvault/aliasvault/commit/382e2e96fa502891638a48404f6d82dc972ab481
https://github.com/aliasvault/aliasvault/releases/tag/0.26.0
https://github.com/aliasvault/aliasvault/security/advisories/GHSA-f65p-p65r-g53q

Tags

[email protected]
CWE-79
2026-03-03
CVE-2026-26266

CVSS Score

9.3 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Privileges Required: NONE
  • Scope: CHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: NONE

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

    View Vector String

Timeline

Published: March 3, 2026, 11:15 p.m.
Last Modified: March 4, 2026, 6:08 p.m.

Status : Undergoing Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.