{"id":"CVE-2026-114713","kind":"vulnerability","aliases":["CVE-2026-114713"],"related":[],"title":"UnrealIRCd: unescaped IRCv3 label tag lets users inject server commands","description":"The labeled-response module in UnrealIRCd 6.0.0 before 6.2.7.1 does not escape the IRCv3 \"label\" message tag when echoing it into replies, which allows any user on a network with two or more linked servers to inject server-to-server commands that are executed with server authority.","summary":"UnrealIRCd 6.0.0 before 6.2.7.1 does not escape the IRCv3 \"label\" tag when echoing it into replies. Any user on a network with two or more linked servers can inject server-to-server commands that run with server authority.","severity":"high","cvss":8.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["irc","runtime","self-hosted","unrealircd"],"not_affected_if":["single-server","version-outside-range"],"how_to_check":"- Run `unrealircd -v` or check the version in your `unrealircd.conf` installation to see if you are on `6.0.0` before `6.2.7.1`\n- Check whether the server is linked to two or more other servers (the `link` blocks in `unrealircd.conf`)","fix":"- UnrealIRCd: upgrade to `6.2.7.1` or later (per the NVD range; the sources do not name a patch path beyond this)","status":"open","published_at":"2026-11-08T03:16:33+00:00","first_seen_at":"2026-11-08T03:45:28+00:00","triaged_at":"2026-11-08T03:46:39+00:00","updated_at":"2026-11-08T03:46:39+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-08T03:46:39Z","model":"claude-haiku-5-5","output":{"fix":"- UnrealIRCd: upgrade to `6.2.7.1` or later (per the NVD range; the sources do not name a patch path beyond this)","reach":"internet","title":"UnrealIRCd: unescaped IRCv3 label tag lets users inject server commands","impact":"high","summary":"UnrealIRCd 6.0.0 before 6.2.7.1 does not escape the IRCv3 \"label\" tag when echoing it into replies. Any user on a network with two or more linked servers can inject server-to-server commands that run with server authority.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["unrealircd","irc","self-hosted"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Users inject server-to-server commands executed with server authority across the network","analyst_note":"Only the NVD record was consulted; the advisory and fix details are not in the sources.\n","how_to_check":"- Run `unrealircd -v` or check the version in your `unrealircd.conf` installation to see if you are on `6.0.0` before `6.2.7.1`\n- Check whether the server is linked to two or more other servers (the `link` blocks in `unrealircd.conf`)","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["single-server","version-outside-range"],"who_is_affected":"Networks running UnrealIRCd 6.0.0 before 6.2.7.1 that link two or more servers are exposed, since the injection needs a linked-server topology to reach server authority. Single-server deployments and other IRC software are not described as affected. unknown whether a single unlinked server is safe in every configuration.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.000762,"input_tokens":4561,"output_tokens":612,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-114713':13A,16A '-2026':12A,15A '6.0.0':24B,69C '6.2.7.1':26B,71C 'allow':86C 'author':61B,110C 'command':10A,56B,104C 'cve':11A,14A 'echo':35B,81C 'escap':29B,74C 'execut':107C 'host':21B 'inject':8A,51B,99C 'irc':17B 'ircv3':3A,31B,76C 'label':4A,32B,64C,77C 'labeled-respons':63C 'let':6A 'link':48B,96C 'messag':78C 'modul':66C 'network':43B,91C 'repli':38B,84C 'respons':65C 'run':58B 'runtim':18B 'self':20B 'self-host':19B 'server':9A,49B,53B,55B,60B,97C,101C,103C,109C 'server-to-serv':52B,100C 'tag':5A,33B,79C 'two':45B,93C 'unescap':2A 'unrealircd':1A,22B,23B,68C 'user':7A,40B,88C","nicknames":[],"mitigations":[],"who_affected":"Networks running UnrealIRCd 6.0.0 before 6.2.7.1 that link two or more servers are exposed, since the injection needs a linked-server topology to reach server authority. Single-server deployments and other IRC software are not described as affected. unknown whether a single unlinked server is safe in every configuration.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","irc","runtime","selfhosted","unrealircd"],"campaign_type":null,"search_a":"'-114713':13A,16A '-2026':12A,15A 'command':10A 'cve':11A,14A 'inject':8A 'ircv3':3A 'label':4A 'let':6A 'server':9A 'tag':5A 'unescap':2A 'unrealircd':1A 'user':7A","search_b":"'6.0.0':24B '6.2.7.1':26B 'author':61B 'command':56B 'echo':35B 'escap':29B 'host':21B 'inject':51B 'irc':17B 'ircv3':31B 'label':32B 'link':48B 'network':43B 'repli':38B 'run':58B 'runtim':18B 'self':20B 'self-host':19B 'server':49B,53B,55B,60B 'server-to-serv':52B 'tag':33B 'two':45B 'unrealircd':22B,23B 'user':40B","search_c":"'6.0.0':69C '6.2.7.1':71C 'allow':86C 'author':110C 'command':104C 'echo':81C 'escap':74C 'execut':107C 'inject':99C 'ircv3':76C 'label':64C,77C 'labeled-respons':63C 'link':96C 'messag':78C 'modul':66C 'network':91C 'repli':84C 'respons':65C 'server':97C,101C,103C,109C 'server-to-serv':100C 'tag':79C 'two':93C 'unrealircd':68C 'user':88C","cause_entry":null,"cause_path":null,"first_public_at":"2026-11-08T03:16:33+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N","cvss_by":"cve@mitre.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-114713","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114713","severity":null,"published_at":"2026-11-08T03:16:33+00:00","modified_at":"2026-11-08T03:16:36+00:00","first_seen_at":"2026-11-08T03:45:28+00:00","fetched_at":"2026-11-08T03:45:28+00:00","note":null}],"documents":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}