---
id: "CVE-2026-114401"
kind: "vulnerability"
aliases: ["CVE-2026-114401"]
title: "Trudesk: regex injection at login lets attackers enumerate valid usernames"
severity: "medium"
cvss: 6.9
epss: 0.00439
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["helpdesk", "package", "self-hosted", "trudesk"]
not_affected_if: ["login-restricted-to-vpn"]
published_at: "2026-10-21T13:18:31+00:00"
first_seen_at: "2026-10-23T21:57:28+00:00"
updated_at: "2026-10-25T03:39:02+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114401", "first_seen_at": "2026-10-23T21:57:28+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-114401", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# Trudesk: regex injection at login lets attackers enumerate valid usernames

Trudesk through 1.2.11 passes user-supplied regex patterns into its login lookup at POST /api/v1/login. An unauthenticated attacker can use patterns like (admin|root) or a.* and tell 'Invalid User' from 'Invalid Password' responses to discover valid account names.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Trudesk version; anything at or below `1.2.11` is in the stated range.
- Send a login request with a regex such as `a.*` to `POST /api/v1/login` and see whether the responses differ between existing and non-existing usernames.

## Timeline

- 2026-10-23T21:57:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114401
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-114401

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_