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

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-10-21 · updated 2026-10-29
Weakness: CWE-943

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.

Affected products

polonel/trudesk: through 1.2.11
polonel/trudesk: through 1.2.11

References

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

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