{"id":"CVE-2020-17519","aliases":["BIT-flink-2020-17519","EUVD-2021-0481","GHSA-395w-qhqr-9fr6"],"status":"published","title":"Apache Flink directory traversal attack: reading remote files through the REST API","description":"A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.98001,"percentile":0.99909,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":true},"cwes":["CWE-22","CWE-552"],"published":"2021-01-05T11:40:14Z","modified":"2026-10-24T10:31:06Z","kev":{"date_added":"2024-05-23","due_date":"2024-06-13","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2024-05-23"},{"source":"kev","since":"2024-05-23"}],"exploits":[{"source":"pocgithub","id":"B1anda0/CVE-2020-17519","title":"B1anda0/CVE-2020-17519","date":"2021-01-06","url":"https://github.com/B1anda0/CVE-2020-17519"},{"source":"pocgithub","id":"QmF0c3UK/CVE-2020-17519","title":"QmF0c3UK/CVE-2020-17519","date":"2021-01-06","url":"https://github.com/QmF0c3UK/CVE-2020-17519"},{"source":"pocgithub","id":"dolevf/apache-flink-directory-traversal.nse","title":"dolevf/apache-flink-directory-traversal.nse","date":"2021-01-06","url":"https://github.com/dolevf/apache-flink-directory-traversal.nse"},{"source":"exploitdb","id":"EDB-49398","title":"Apache Flink 1.11.0 - Unauthenticated Arbitrary File Read (Metasploit)","type":"webapps","platform":"java","date":"2021-01-08","verified":true,"url":"https://www.exploit-db.com/exploits/49398"},{"source":"pocgithub","id":"dev-team-12x/CVE-2020-17519","title":"dev-team-12x/CVE-2020-17519","date":"2021-01-08","url":"https://github.com/dev-team-12x/CVE-2020-17519"},{"source":"pocgithub","id":"murataydemir/CVE-2020-17519","title":"murataydemir/CVE-2020-17519","date":"2021-01-10","url":"https://github.com/murataydemir/CVE-2020-17519"},{"source":"pocgithub","id":"radbsie/CVE-2020-17519-Exp","title":"radbsie/CVE-2020-17519-Exp","date":"2021-01-14","url":"https://github.com/radbsie/CVE-2020-17519-Exp"},{"source":"pocgithub","id":"yaunsky/CVE-2020-17519-Apache-Flink","title":"yaunsky/CVE-2020-17519-Apache-Flink","date":"2021-01-18","url":"https://github.com/yaunsky/CVE-2020-17519-Apache-Flink"},{"source":"pocgithub","id":"Osyanina/westone-CVE-2020-17519-scanner","title":"Osyanina/westone-CVE-2020-17519-scanner","date":"2021-02-25","url":"https://github.com/Osyanina/westone-CVE-2020-17519-scanner"},{"source":"pocgithub","id":"givemefivw/CVE-2020-17519","title":"givemefivw/CVE-2020-17519","date":"2021-04-13","url":"https://github.com/givemefivw/CVE-2020-17519"},{"source":"pocgithub","id":"MrCl0wnLab/SimplesApachePathTraversal","title":"MrCl0wnLab/SimplesApachePathTraversal","date":"2021-10-13","url":"https://github.com/MrCl0wnLab/SimplesApachePathTraversal"},{"source":"pocgithub","id":"zhangweijie11/CVE-2020-17519","title":"zhangweijie11/CVE-2020-17519","date":"2022-03-08","url":"https://github.com/zhangweijie11/CVE-2020-17519"},{"source":"pocgithub","id":"GazettEl/CVE-2020-17519","title":"GazettEl/CVE-2020-17519","date":"2025-03-02","url":"https://github.com/GazettEl/CVE-2020-17519"},{"source":"pocgithub","id":"shoucheng3/apache__flink_CVE-2020-17519_1-11-2","title":"shoucheng3/apache__flink_CVE-2020-17519_1-11-2","date":"2025-08-20","url":"https://github.com/shoucheng3/apache__flink_CVE-2020-17519_1-11-2"},{"source":"pocgithub","id":"CyberCTF/vulhub-flink-cve-2020-17519","title":"CyberCTF/vulhub-flink-cve-2020-17519","date":"2026-10-08","url":"https://github.com/CyberCTF/vulhub-flink-cve-2020-17519"},{"source":"metasploit","id":"auxiliary/scanner/http/apache_flink_jobmanager_traversal","title":"Apache Flink JobManager Traversal","type":"auxiliary","date":"2021-01-05","verified":true,"url":"https://www.rapid7.com/db/modules/auxiliary/scanner/http/apache_flink_jobmanager_traversal"},{"source":"nuclei","id":"CVE-2020-17519","title":"Apache Flink - Local File Inclusion","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-17519.yaml"}],"fixes":[{"ecosystem":"Maven","package":"org.apache.flink:flink-runtime_2.11","fixed_in":["1.11.3"],"sources":["ghsa","osv"]},{"ecosystem":"Maven","package":"org.apache.flink:flink-runtime_2.12","fixed_in":["1.11.3"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"flink","fixed_in":["1.11.3"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.apache.flink:flink-runtime_2.11","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.11.0"},{"fixed":"1.11.3"}]}]},{"source":"ghsa","ecosystem":"Maven","package":"org.apache.flink:flink-runtime_2.12","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.11.0"},{"fixed":"1.11.3"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"flink","ranges":[{"type":"SEMVER","events":[{"introduced":"1.11.0"},{"fixed":"1.11.3"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.apache.flink:flink-runtime_2.11","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.11.0"},{"fixed":"1.11.3"}]}],"versions":["1.11.0","1.11.1","1.11.2"]},{"source":"osv","ecosystem":"Maven","package":"org.apache.flink:flink-runtime_2.12","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.11.0"},{"fixed":"1.11.3"}]}],"versions":["1.11.0","1.11.1","1.11.2"]}],"products":[{"vendor":"apache","product":"flink"},{"vendor":"apache software foundation","product":"apache flink"}],"references":[{"url":"https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d%40%3Cdev.flink.apache.org%3E","tags":["x_refsource_MISC","mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Vendor Advisory","advisory","web"]},{"url":"https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d%40%3Cuser.flink.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Issue Tracking","report","web"]},{"url":"https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d%40%3Cannounce.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Vendor Advisory","advisory","web"]},{"url":"http://www.openwall.com/lists/oss-security/2021/01/05/2","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.apache.org/thread.html/r28f17e564950d663e68cc6fe75756012dda62ac623766bb9bc5e7034%40%3Cissues.flink.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Issue Tracking","report","web"]},{"url":"http://packetstormsecurity.com/files/160849/Apache-Flink-1.11.0-Arbitrary-File-Read-Directory-Traversal.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry","advisory","evidence","web"]},{"url":"https://lists.apache.org/thread.html/r2fc60b30557e4a537c2a6293023049bd1c49fd92b518309aa85a0398%40%3Cissues.flink.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Issue Tracking","report","web"]},{"url":"https://lists.apache.org/thread.html/r4e1b72bfa789ea5bc20b8afe56119200ed25bdab0eb80d664fa5bfe2%40%3Cdev.flink.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Vendor Advisory","advisory","web"]},{"url":"https://lists.apache.org/thread.html/r0a433be10676f4fe97ca423d08f914e0ead341c901216f292d2bbe83%40%3Cissues.flink.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","discussion","article","web"]},{"url":"https://lists.apache.org/thread.html/r88b55f3ebf1f8f4e1cc61f030252aaef4b77060b56557a243abb92a1%40%3Cissues.flink.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Vendor Advisory","advisory","web"]},{"url":"https://lists.apache.org/thread.html/r88f427865fb6aa6e6378efe07632a1906b430365e15e3b9621aabe1d%40%3Cissues.flink.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Vendor Advisory","advisory","web"]},{"url":"https://lists.apache.org/thread.html/ra8c96bf3ccb4e491f9ce87ba35f134b4449beb2a38d1ce28fd89001f%40%3Cdev.flink.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Issue Tracking","report","web"]},{"url":"https://lists.apache.org/thread.html/r229167538863518738e02f4c1c5a8bb34c1d45dadcc97adf6676b0c1%40%3Cdev.flink.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Issue Tracking","report","web"]},{"url":"https://lists.apache.org/thread.html/r90890afea72a9571d666820b2fe5942a0a5f86be406fa31da3dd0922%40%3Cannounce.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Not Applicable","discussion","article","web"]},{"url":"https://lists.apache.org/thread.html/r1125f3044a0946d1e7e6f125a6170b58d413ebd4a95157e4608041c7%40%3Cannounce.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","discussion","article","web"]},{"url":"https://lists.apache.org/thread.html/r26fcdd4fe288323006253437ebc4dd6fdfadfb5e93465a0e4f68420d%40%3Cuser-zh.flink.apache.org%3E","tags":["x_refsource_MISC","x_transferred","Issue Tracking","report","web"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-17519","tags":["government-resource","US Government Resource","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-17519","tags":["web","advisory"]},{"url":"https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d@%3Cannounce.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d@%3Cdev.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d@%3Cuser.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r28f17e564950d663e68cc6fe75756012dda62ac623766bb9bc5e7034@%3Cissues.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r0a433be10676f4fe97ca423d08f914e0ead341c901216f292d2bbe83@%3Cissues.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r2fc60b30557e4a537c2a6293023049bd1c49fd92b518309aa85a0398@%3Cissues.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r4e1b72bfa789ea5bc20b8afe56119200ed25bdab0eb80d664fa5bfe2@%3Cdev.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r88b55f3ebf1f8f4e1cc61f030252aaef4b77060b56557a243abb92a1@%3Cissues.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r88f427865fb6aa6e6378efe07632a1906b430365e15e3b9621aabe1d@%3Cissues.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/ra8c96bf3ccb4e491f9ce87ba35f134b4449beb2a38d1ce28fd89001f@%3Cdev.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r229167538863518738e02f4c1c5a8bb34c1d45dadcc97adf6676b0c1@%3Cdev.flink.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r90890afea72a9571d666820b2fe5942a0a5f86be406fa31da3dd0922@%3Cannounce.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r1125f3044a0946d1e7e6f125a6170b58d413ebd4a95157e4608041c7@%3Cannounce.apache.org%3E","tags":["web"]},{"url":"https://lists.apache.org/thread.html/r26fcdd4fe288323006253437ebc4dd6fdfadfb5e93465a0e4f68420d@%3Cuser-zh.flink.apache.org%3E","tags":["web"]},{"url":"https://github.com/advisories/GHSA-395w-qhqr-9fr6"},{"url":"https://github.com/apache/flink","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-17519","title":"Apache Flink directory traversal attack: reading remote files through the REST API","description":"A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.","status":"published","published":"2021-01-05T11:40:14Z","modified":"2025-10-21T23:35:30.697Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-552"],"updated_at":"2026-11-02T14:35:54.80237Z"}],"euvd":[{"id":"EUVD-2021-0481","description":"A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.","status":"published","published":"2021-01-05T11:40:14Z","modified":"2025-10-21T23:35:30Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"exploited_since":"2024-05-23","updated_at":"2026-11-02T20:31:25.308373Z"}],"ghsa":[{"id":"GHSA-395w-qhqr-9fr6","title":"Path Traversal in Apache Flink","description":"A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.","status":"published","published":"2021-01-06T20:01:34Z","modified":"2025-10-22T17:58:29Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:H","level":"high"}],"cwes":["CWE-22","CWE-552"],"updated_at":"2026-11-02T14:39:02.474737Z"}],"kev":[{"id":"CVE-2020-17519","title":"Apache Flink Improper Access Control Vulnerability","description":"Apache Flink contains an improper access control vulnerability that allows an attacker to read any file on the local filesystem of the JobManager through its REST interface.","cwes":["CWE-552"],"kev":{"date_added":"2024-05-23","due_date":"2024-06-13","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.234141Z"}],"nvd":[{"id":"CVE-2020-17519","description":"A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.","status":"published","published":"2021-01-05T12:15:12.68Z","modified":"2026-06-17T02:59:04.01Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-552"],"updated_at":"2026-11-02T14:06:28.340168Z"}],"osv":[{"id":"CVE-2020-17519","description":"A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.","status":"published","published":"2021-01-05T12:15:12.68Z","modified":"2026-10-24T10:31:06.82178538Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:15.212689Z"},{"id":"GHSA-395w-qhqr-9fr6","title":"Path Traversal in Apache Flink","description":"A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.","status":"published","published":"2021-01-06T20:01:34Z","modified":"2025-10-22T19:32:40.489579Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:H","level":"high"}],"cwes":["CWE-22","CWE-552"],"updated_at":"2026-11-02T15:46:35.406455Z"},{"id":"BIT-flink-2020-17519","title":"Apache Flink directory traversal attack: reading remote files through the REST API","description":"A change introduced in Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process. Access is restricted to files accessible by the JobManager process. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit b561010b0ee741543c3953306037f00d7a9f0801 from apache/flink:master.","status":"published","published":"2024-03-06T10:51:56.799Z","modified":"2026-09-10T16:01:31.587049513Z","updated_at":"2026-11-02T15:28:29.563843Z"}]}}