---
id: CVE-2026-114401
title: >-
  Trudesk through 1.2.11 Username Enumeration via Regex Injection in
  /api/v1/login
summary: >-
  Trudesk through 1.2.11 contains a regular expression injection vulnerability
  that allows unauthenticated attackers to enumerate usernames by submitting
  regex patterns to POST /api/v1/login. Attackers can send alternations or
  prefixes lik…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-943
vendor: polonel
product: trudesk
affected:
  - trudesk <= 1.2.11
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:39:54.187Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114401'
references:
  - url: 'https://hackmd.io/@leediay/multiple-vuln-trudesk-1211'
  - url: >-
      https://github.com/polonel/trudesk/blob/v1.2.11/src/models/user.js#L310-L319
  - url: >-
      https://github.com/polonel/trudesk/blob/v1.2.11/src/controllers/api/v1/common.js#L45-L65
  - url: 'https://github.com/polonel/trudesk'
  - url: >-
      https://www.vulncheck.com/advisories/trudesk-through-1.2.11-username-enumeration-via-regex-injection-in-api-v1-login
    label: >-
      VulnCheck Advisory: Trudesk through 1.2.11 Username Enumeration via Regex
      Injection in /api/v1/login
tags:
  - cve.org
ingestedAt: '2026-10-21T12:48:53.651Z'
---

## Overview

Trudesk through 1.2.11 contains a regular expression injection vulnerability that allows unauthenticated attackers to enumerate usernames by submitting regex patterns to POST /api/v1/login. Attackers can send alternations or prefixes like (admin|root) or a.* and distinguish 'Invalid User' from 'Invalid Password' responses to discover valid accounts.

## Affected

- `trudesk <= 1.2.11`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.