{"id":"CVE-2026-114401","kind":"vulnerability","aliases":["CVE-2026-114401"],"related":[],"title":"Trudesk: regex injection at login lets attackers enumerate valid usernames","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.","summary":"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.","severity":"medium","cvss":6.9,"epss":0.00439,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["helpdesk","package","self-hosted","trudesk"],"not_affected_if":["login-restricted-to-vpn"],"how_to_check":"- Check the installed Trudesk version; anything at or below `1.2.11` is in the stated range.\n- 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.","fix":null,"status":"open","published_at":"2026-10-21T13:18:31+00:00","first_seen_at":"2026-10-23T21:57:28+00:00","triaged_at":"2026-10-25T03:39:02+00:00","updated_at":"2026-10-25T03:39:02+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T03:39:02Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"Trudesk: regex injection at login lets attackers enumerate valid usernames","impact":"low","summary":"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.","category":"package","nicknames":[],"who_cares":["trudesk","self-hosted","helpdesk"],"confidence":0.6,"needs_auth":"no","worst_case":"Attackers learn valid usernames, enabling targeted password guessing.","analyst_note":"Find the fixed Trudesk version and whether the login regex was patched, via the NVD entry or the Trudesk GitHub repository.","how_to_check":"- Check the installed Trudesk version; anything at or below `1.2.11` is in the stated range.\n- 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.","needs_analyst":true,"not_affected_if":["login-restricted-to-vpn"],"who_is_affected":"Any self-hosted Trudesk instance up to and including 1.2.11 with its login endpoint reachable is in scope, because the flaw is in the unauthenticated login route. Instances behind a network restriction that blocks the login endpoint from untrusted sources are less exposed. The sources do not name a patched version.","user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000621,"input_tokens":3386,"output_tokens":564,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-114401':13A,16A '-2026':12A,15A '/api/v1/login':38B,85C '1.2.11':25B,65C 'account':61B,108C 'admin':46B,93C 'allow':73C 'altern':89C 'attack':7A,41B,75C,86C 'contain':66C 'cve':11A,14A 'discov':59B,106C 'distinguish':98C 'enumer':8A,77C 'express':69C 'helpdesk':17B 'host':21B 'inject':3A,70C 'invalid':52B,55B,99C,102C 'let':6A 'like':45B,92C 'login':5A,34B 'lookup':35B 'name':62B 'packag':18B 'pass':26B 'password':56B,103C 'pattern':31B,44B,82C 'post':37B,84C 'prefix':91C 'regex':2A,30B,81C 'regular':68C 'respons':57B,104C 'root':47B,94C 'self':20B 'self-host':19B 'send':88C 'submit':80C 'suppli':29B 'tell':51B 'trudesk':1A,22B,23B,63C 'unauthent':40B,74C 'use':43B 'user':28B,53B,100C 'user-suppli':27B 'usernam':10A,78C 'valid':9A,60B,107C 'vulner':71C","nicknames":[],"mitigations":[],"who_affected":"Any self-hosted Trudesk instance up to and including 1.2.11 with its login endpoint reachable is in scope, because the flaw is in the unauthenticated login route. Instances behind a network restriction that blocks the login endpoint from untrusted sources are less exposed. The sources do not name a patched version.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-21T13:18:31+00:00","kev":null,"cvss_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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-114401","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114401","severity":null,"published_at":"2026-10-21T13:18:31+00:00","modified_at":"2026-10-22T15:44:59+00:00","first_seen_at":"2026-10-23T21:57:28+00:00","fetched_at":"2026-10-23T22:29:01+00:00","note":null},{"source":"epss","external_id":"CVE-2026-114401","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114401","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T13:15:54+00:00","fetched_at":"2026-10-24T13:15:54+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}