{"id":"CVE-2026-5422","aliases":["DEBIAN-CVE-2026-5422","EUVD-2026-33905","GHSA-gf7q-q4j7-hp7c","PYSEC-2026-2532","UBUNTU-CVE-2026-5422","openSUSE-SU-2026:10972-1"],"status":"published","title":"Path Traversal in jupyter/jupyter","description":"A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","severity":{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.04858,"percentile":0.92107,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-23"],"published":"2026-06-02T09:11:15Z","modified":"2026-10-28T02:30:27Z","fixes":[{"ecosystem":"PyPI","package":"jupyter-server","fixed_in":["2.18.2"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"python-jupyter-server","fixed_in":["2.19.0-1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.23.3-1","1.23.3-2","2.14.0-1","2.14.2-1","2.14.2-2","2.14.2-3","2.14.2-4","2.14.2-5","2.15.0-1","2.17.0-1","2.20.0-1","2.20.0-2","2.20.0-3","2.9.1-1"]},{"source":"osv","ecosystem":"Debian:13","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.15.0-1","2.17.0-1","2.20.0-1","2.20.0-2","2.20.0-3"]},{"source":"osv","ecosystem":"Debian:14","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.15.0-1","2.17.0-1","2.20.0-1","2.20.0-2","2.20.0-3"]},{"source":"osv","ecosystem":"PyPI","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.18.2"}]}],"versions":["0.0.0","0.0.1","0.0.2","0.0.3","0.0.4","0.0.5","0.1.0","0.1.1","0.2.0","0.2.1","0.3.0","1.0.0","1.0.0rc0","1.0.0rc1","1.0.0rc10","1.0.0rc11","1.0.0rc12","1.0.0rc13","1.0.0rc14","1.0.0rc15","1.0.0rc16","1.0.0rc2","1.0.0rc3","1.0.0rc4","1.0.0rc5","1.0.0rc6","1.0.0rc7","1.0.0rc8","1.0.0rc9","1.0.1","1.0.10","1.0.11","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.0.8","1.0.9","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.10.0","1.10.1","1.10.2","1.11.0","1.11.1","1.11.2","1.12.0","1.12.1","1.13.0","1.13.1","1.13.2","1.13.3","1.13.4","1.13.5","1.15.0","1.15.1","1.15.2","1.15.3","1.15.4","1.15.5","1.15.6","1.16.0","1.17.0","1.17.1","1.18.0","1.18.1","1.19.0","1.19.1","1.2.0","1.2.1","1.2.2","1.2.3","1.21.0","1.23.0","1.23.1","1.23.2","1.23.3","1.23.4","1.23.5","1.23.6","1.24.0","1.3.0","1.4.0","1.4.1","1.5.0","1.5.1","1.6.0","1.6.1","1.6.2","1.6.3","1.6.4","1.7.0","1.7.0a1","1.7.0a2","1.8.0","1.9.0","2.0.0","2.0.0a0","2.0.0a1","2.0.0a2","2.0.0b0","2.0.0b1","2.0.0rc0","2.0.0rc1","2.0.0rc2","2.0.0rc3","2.0.0rc4","2.0.0rc5","2.0.0rc6","2.0.0rc7","2.0.0rc8","2.0.1","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.0.7","2.1.0","2.10.0","2.10.1","2.11.0","2.11.1","2.11.2","2.12.0","2.12.1","2.12.2","2.12.3","2.12.4","2.12.5","2.13.0","2.14.0","2.14.1","2.14.2","2.15.0","2.16.0","2.17.0","2.18.0","2.18.1","2.2.0","2.2.1","2.3.0","2.4.0","2.5.0","2.6.0","2.7.0","2.7.1","2.7.2","2.7.3","2.8.0","2.9.0","2.9.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.2-1","1.13.1-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.23.3-1","1.23.3-2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.14.2-5","2.15.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.17.0-1","2.20.0-3"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.15.0-1","2.17.0-1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"python-jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.19.0-1.1"}]}]}],"products":[{"vendor":"jupyter","product":"jupyter/jupyter"},{"vendor":"jupyter","product":"jupyter_server"}],"references":[{"url":"https://huntr.com/bounties/24a36953-6490-466f-8cb2-a90d1ca56e0f","tags":["exploit","Exploit","Third Party Advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5422","tags":["advisory"]},{"url":"http://github.com/jupyter-server/jupyter_server/commit/0d829f2c35a481c3b24ecbe1e25a6f79954e88f2","tags":["web"]},{"url":"https://github.com/advisories/GHSA-gf7q-q4j7-hp7c","tags":["advisory"]},{"url":"https://github.com/jupyter-server/jupyter_server","tags":["package"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2026-2532.yaml","tags":["web"]},{"url":"https://pypi.org/project/jupyter-server","tags":["web","package"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5422.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-5422","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-5422","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-5422","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-5422","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-5422","title":"Path Traversal in jupyter/jupyter","description":"A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","status":"published","published":"2026-06-02T09:11:15.755Z","modified":"2026-06-02T12:14:02.747Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-23"],"updated_at":"2026-11-02T13:39:27.849196Z"}],"euvd":[{"id":"EUVD-2026-33905","description":"A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","status":"published","published":"2026-06-02T09:11:15Z","modified":"2026-06-02T12:14:02Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:56.977213Z"}],"ghsa":[{"id":"GHSA-gf7q-q4j7-hp7c","title":"Duplicate Advisory: Jupyter Server vulnerable to Path Traversal via incorrect root directory boundary check in _get_os_path() ","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-5789-5fc7-67v3. This link is maintained to preserve external references.\n\n### Original Description\nA path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","status":"withdrawn","published":"2026-06-02T12:31:26Z","modified":"2026-07-31T20:20:53Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-23"],"updated_at":"2026-11-02T14:40:55.903445Z"}],"nvd":[{"id":"CVE-2026-5422","description":"A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","status":"published","published":"2026-06-02T10:16:25.8Z","modified":"2026-07-22T19:10:00.12Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"},{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-23"],"updated_at":"2026-11-02T14:12:22.022466Z"}],"osv":[{"id":"CVE-2026-5422","title":"Path Traversal in jupyter/jupyter","description":"A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","status":"published","published":"2026-06-02T09:11:15.755Z","modified":"2026-10-28T02:30:27.292792623Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-23"],"updated_at":"2026-11-02T15:45:10.818486Z"},{"id":"DEBIAN-CVE-2026-5422","description":"A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","status":"published","published":"2026-06-02T10:16:25.8Z","modified":"2026-10-01T03:03:26.230410544Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:57.236551Z"},{"id":"GHSA-gf7q-q4j7-hp7c","title":"Duplicate Advisory: Jupyter Server vulnerable to Path Traversal via incorrect root directory boundary check in _get_os_path() ","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-5789-5fc7-67v3. This link is maintained to preserve external references.\n\n### Original Description\nA path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","status":"withdrawn","published":"2026-06-02T12:31:26Z","modified":"2026-07-31T20:30:22.001739712Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-23"],"updated_at":"2026-11-02T15:46:47.822182Z"},{"id":"PYSEC-2026-2532","title":"Jupyter Server vulnerable to Path Traversal via incorrect root directory boundary check in _get_os_path() ","description":"A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","status":"published","published":"2026-07-13T15:46:13.935289Z","modified":"2026-07-13T16:31:58.966038327Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:55.961245Z"},{"id":"UBUNTU-CVE-2026-5422","description":"A path traversal vulnerability exists in jupyter-server version 2.17.0 due to an incorrect root directory boundary check in the _get_os_path() function within jupyter_server/services/contents/fileio.py. The check uses startswith(root) without appending a trailing path separator, allowing sibling directories with names starting with the same prefix as root_dir to bypass the check. Additionally, the to_os_path() function in utils.py does not strip \"..\" from path parts, enabling traversal sequences to bypass the vulnerable check. This vulnerability can lead to unauthorized read/write access to files in sibling directories, potentially exposing sensitive data in shared hosting environments.","status":"published","published":"2026-06-02T10:16:00Z","modified":"2026-10-17T12:59:03.883385183Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"medium"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:56:41.382716Z"},{"id":"openSUSE-SU-2026:10972-1","title":"python311-jupyter-server-2.19.0-1.1 on GA media","description":"These are all security issues fixed in the python311-jupyter-server-2.19.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-06-08T00:00:00Z","modified":"2026-06-09T09:00:05.985642865Z","updated_at":"2026-11-02T16:58:38.95195Z"}]}}