{"id":"CVE-2020-1956","kind":"vulnerability","aliases":["CVE-2020-1956"],"related":[],"title":"Apache Kylin: Apache Kylin OS Command Injection Vulnerability","description":"Apache Kylin 2.3.0, and releases up to 2.6.5 and 3.0.1 has some restful apis which will concatenate os command with the user input string, a user is likely to be able to execute any os command without any protection or validation.","summary":"Apache Kylin, an open-source OLAP engine for big data, has an OS command injection flaw that lets remote attackers run commands on the server. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":9.0,"epss":0.97337,"exploited":true,"exploited_at":"2022-03-25T00:00:00+00:00","products":[{"name":"Apache Kylin","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apache-kylin","exploited","java","package","self-hosted"],"not_affected_if":["not-running-kylin"],"how_to_check":null,"fix":"Apply the updates per vendor instructions (Apache Kylin security advisory); the affected and fixed versions are not stated in the sources.","status":"open","published_at":"2020-05-22T14:15:11+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:20:07+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-23T21:20:07Z","model":"claude-haiku-5-5","output":{"fix":"Apply the updates per vendor instructions (Apache Kylin security advisory); the affected and fixed versions are not stated in the sources.","reach":"internet","impact":"high","summary":"Apache Kylin, an open-source OLAP engine for big data, has an OS command injection flaw that lets remote attackers run commands on the server. CISA lists it as actively exploited in the wild.","category":"package","who_cares":["apache-kylin","java","self-hosted"],"confidence":0.7,"needs_auth":"unknown","worst_case":"Attacker runs arbitrary operating system commands on the Kylin server remotely.","analyst_note":"Find affected and fixed Apache Kylin versions and the exact vulnerable endpoint in the Apache Kylin security advisory for CVE-2020-1956, and confirm whether authentication is required.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["not-running-kylin"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000464,"input_tokens":2811,"output_tokens":365,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find affected and fixed Apache Kylin versions and the exact vulnerable endpoint in the Apache Kylin security advisory for CVE-2020-1956, and confirm whether authentication is required.","search":"'-1956':11A,14A '-2020':10A,13A '2.3.0':63C '2.6.5':68C '3.0.1':70C 'abl':91C 'activ':56B 'apach':1A,3A,18B,26B,61C 'apache':15A 'apache-kylin':17B 'api':74C 'attack':46B 'big':35B 'cisa':52B 'command':6A,40B,48B,79C,96C 'concaten':77C 'cve':9A,12A 'data':36B 'engin':33B 'execut':93C 'exploit':20B,57B 'flaw':42B 'host':25B 'inject':7A,41B 'input':83C 'java':21B 'kylin':2A,4A,16A,19B,27B,62C 'let':44B 'like':88C 'list':53B 'olap':32B 'open':30B 'open-sourc':29B 'os':5A,39B,78C,95C 'packag':22B 'protect':99C 'releas':65C 'remot':45B 'rest':73C 'run':47B 'self':24B 'self-host':23B 'server':51B 'sourc':31B 'string':84C 'user':82C,86C 'valid':101C 'vulner':8A 'wild':60B 'without':97C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-05-22T14:15:11+00:00","kev":{"dateAdded":"2022-03-25","dueDate":"2022-04-15","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2020-1956","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-1956","severity":null,"published_at":"2022-03-25T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T20:35:36+00:00","note":null},{"source":"epss","external_id":"CVE-2020-1956","url":"https://api.first.org/data/v1/epss?cve=CVE-2020-1956","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2020-1956","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1956","severity":null,"published_at":"2020-05-22T14:15:11+00:00","modified_at":"2026-06-17T03:02:43+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}