{"id":"CVE-2026-105454","kind":"vulnerability","aliases":["CVE-2026-105454"],"related":[],"title":"RT: ticket links let HTML email plant scripts that run for viewers","description":"RT's automatic link creation for URLs in HTML ticket content does\n      not HTML-escape the URL it places in the link. A URL crafted to\n      break out of the link's address can add a script that runs when the\n      ticket history is displayed, with no further action by the viewer.\n      Anyone who can add HTML content to a ticket can plant it. That\n      includes an unauthenticated sender of HTML email to any queue that\n      grants CreateTicket or ReplyToTicket to Everyone, which is routine\n      for a queue that accepts mail from the public. The script runs in\n      the session of any user who views the ticket, and can act in RT\n      with that user's authority.\n\n\nThis issue was fixed in version 5.0.11 and 6.0.4","summary":"RT (Request Tracker) does not HTML-escape URLs it turns into links in HTML ticket content. A crafted URL can break out of the link and add a script that runs in the browser of anyone who views the ticket history, acting with that user's RT authority.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","request-tracker","rt","self-hosted","web-ticketing"],"not_affected_if":["plain-text-only-mail","rights-restricted-to-logged-in-users"],"how_to_check":"- Check the installed RT version, for example with `rt --version` or the RT package on the host; unknown otherwise.\n- Check whether any queue grants `CreateTicket` or `ReplyToTicket` to Everyone, since that lets unauthenticated senders add ticket content.","fix":"- RT `5.0.11`\n- RT `6.0.4`","status":"open","published_at":"2026-10-30T16:17:36+00:00","first_seen_at":"2026-10-30T16:31:25+00:00","triaged_at":"2026-10-30T16:32:33+00:00","updated_at":"2026-10-30T16:32:33+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-30T16:32:33Z","model":"claude-haiku-5-5","output":{"fix":"- RT `5.0.11`\n- RT `6.0.4`","reach":"internet","title":"RT: ticket links let HTML email plant scripts that run for viewers","impact":"high","summary":"RT (Request Tracker) does not HTML-escape URLs it turns into links in HTML ticket content. A crafted URL can break out of the link and add a script that runs in the browser of anyone who views the ticket history, acting with that user's RT authority.","audience":"businesses","category":"package","nicknames":[],"who_cares":["request-tracker","rt","self-hosted","web-ticketing"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"script runs in a viewer's session and acts with their RT authority","analyst_note":"","how_to_check":"- Check the installed RT version, for example with `rt --version` or the RT package on the host; unknown otherwise.\n- Check whether any queue grants `CreateTicket` or `ReplyToTicket` to Everyone, since that lets unauthenticated senders add ticket content.","plain_action":"","needs_analyst":false,"not_affected_if":["rights-restricted-to-logged-in-users","plain-text-only-mail"],"who_is_affected":"Teams running Request Tracker that accept ticket content, especially HTML email, from people who are not logged in, such as a public-facing queue where CreateTicket or ReplyToTicket is granted to Everyone. Staff who view those tickets in their browser are the ones at risk. Installations that only accept mail from authenticated users or that do not grant those rights to Everyone are less exposed.","user_interaction":"yes","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.00072,"input_tokens":4261,"output_tokens":588,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-105454':15A,18A '-2026':14A,17A '5.0.11':203C '6.0.4':205C 'accept':169C 'act':72B,189C 'action':128C 'add':57B,114C,135C 'address':112C 'anyon':66B,132C 'author':78B,196C 'automat':81C 'break':51B,106C 'browser':64B 'content':46B,89C,137C 'craft':48B,104C 'createticket':157C 'creation':83C 'cve':13A,16A 'display':124C 'email':6A,151C 'escap':37B,94C 'everyon':161C 'fix':200C 'grant':156C 'histori':71B,122C 'host':26B 'html':5A,36B,44B,87C,93C,136C,150C 'html-escap':35B,92C 'includ':145C 'issu':198C 'let':4A 'link':3A,42B,55B,82C,101C,110C 'mail':170C 'packag':19B 'place':98C 'plant':7A,142C 'public':173C 'queue':154C,167C 'replytoticket':159C 'request':21B,31B 'request-track':20B 'routin':164C 'rt':1A,23B,30B,77B,79C,191C 'run':10A,61B,118C,176C 'script':8A,59B,116C,175C 'self':25B 'self-host':24B 'sender':148C 'session':179C 'ticket':2A,29B,45B,70B,88C,121C,140C,186C 'tracker':22B,32B 'turn':40B 'unauthent':147C 'url':38B,49B,85C,96C,103C 'user':75B,182C,194C 'version':202C 'view':68B,184C 'viewer':12A,131C 'web':28B 'web-ticket':27B","nicknames":[],"mitigations":[],"who_affected":"Teams running Request Tracker that accept ticket content, especially HTML email, from people who are not logged in, such as a public-facing queue where CreateTicket or ReplyToTicket is granted to Everyone. Staff who view those tickets in their browser are the ones at risk. Installations that only accept mail from authenticated users or that do not grant those rights to Everyone are less exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"first_public_at":"2026-10-30T16:17:36+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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":"cvd@cert.pl","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-105454","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105454","severity":null,"published_at":"2026-10-30T16:17:36+00:00","modified_at":"2026-10-30T16:17:36+00:00","first_seen_at":"2026-10-30T16:31:25+00:00","fetched_at":"2026-10-30T16:31:25+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"}