{"id":"CVE-2023-40170","aliases":["ALPINE-CVE-2023-40170","DEBIAN-CVE-2023-40170","EUVD-2023-0103","GHSA-64x5-55rw-9974","PYSEC-2023-157","UBUNTU-CVE-2023-40170","openSUSE-SU-2024:13260-1","openSUSE-SU-2026:12012-1"],"status":"published","title":"cross-site inclusion (XSSI) of files in jupyter-server","description":"jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.","severity":{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00623,"percentile":0.50356,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-284","CWE-306","CWE-79"],"published":"2023-08-28T20:01:57Z","modified":"2026-11-03T06:32:48Z","fixes":[{"ecosystem":"PyPI","package":"jupyter-server","fixed_in":["2.7.2"],"sources":["ghsa","osv"]},{"ecosystem":"Alpine:v3.19","package":"jupyter-server","fixed_in":["2.7.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"jupyter-server","fixed_in":["2.7.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"jupyter-server","fixed_in":["2.7.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"jupyter-server","fixed_in":["2.7.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"jupyter-server","fixed_in":["2.7.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"jupyter-server","fixed_in":["2.7.3-r0"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"jupyter-server","fixed_in":["2.14.2-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"jupyter-server","fixed_in":["2.14.2-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.3-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.3-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.3-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.3-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.3-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.3-r0"}]}]},{"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"},{"fixed":"2.14.2-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14.2-1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"jupyter-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.2"}]}],"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","2.2.0","2.2.1","2.3.0","2.4.0","2.5.0","2.6.0","2.7.0","2.7.1"]},{"source":"osv","ecosystem":"PyPI","package":"jupyter-server","ranges":[{"type":"GIT","events":[{"introduced":"0"},{"fixed":"87a4927272819f0b1cae1afa4c8c86ee2da002fd"}]},{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.2"}]}],"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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Advisory","advisory","web","report"]},{"url":"https://github.com/jupyter-server/jupyter_server/commit/87a4927272819f0b1cae1afa4c8c86ee2da002fd","tags":["x_refsource_MISC","x_transferred","Patch","fix","web","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF/","tags":["x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ/","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-40170","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2023-157.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-64x5-55rw-9974"},{"url":"https://security.alpinelinux.org/vuln/CVE-2023-40170","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40170.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-40170","tags":["advisory"]},{"url":"https://github.com/jupyter-server/jupyter_server","tags":["package"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2023-40170","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-40170","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2023-39968","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-40170","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-26232","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-49080","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2023-40170","title":"cross-site inclusion (XSSI) of files in jupyter-server","description":"jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.","status":"published","published":"2023-08-28T20:01:57.156Z","modified":"2025-02-13T17:03:25.64Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-284","CWE-306"],"updated_at":"2026-11-02T14:35:21.612665Z"}],"euvd":[{"id":"EUVD-2023-0103","description":"jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.","status":"published","published":"2023-08-28T20:01:57Z","modified":"2025-02-13T17:03:25Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:03:49.604577Z"}],"ghsa":[{"id":"GHSA-64x5-55rw-9974","title":"cross-site inclusion (XSSI) of files in jupyter-server","description":"### Impact\n\nImproper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\".\n\n### Patches\n\nJupyter Server 2.7.2\n\n### Workarounds\n\nUse lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.\n\n### References\n\nUpstream patch for CVE-2019-9644 was not applied completely, leaving part of the vulnerability open.\n\nVulnerability reported by Tim Coen via the [bug bounty program](https://app.intigriti.com/programs/jupyter/jupyter/detail) [sponsored by the European Commission](https://commission.europa.eu/news/european-commissions-open-source-programme-office-starts-bug-bounties-2022-01-19_en) and hosted on the [Intigriti platform](https://www.intigriti.com/).","status":"published","published":"2023-08-29T23:34:09Z","modified":"2023-11-11T05:01:52Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79","CWE-284","CWE-306"],"updated_at":"2026-11-02T14:37:20.311836Z"}],"nvd":[{"id":"CVE-2023-40170","description":"jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.","status":"published","published":"2023-08-28T21:15:07.873Z","modified":"2026-06-17T06:16:31.72Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-284","CWE-306","CWE-79"],"updated_at":"2026-11-02T14:08:25.025396Z"}],"osv":[{"id":"ALPINE-CVE-2023-40170","description":"jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.","status":"published","published":"2023-08-28T21:15:07.873Z","modified":"2026-11-03T06:32:48.879202033Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T07:16:46.202932Z"},{"id":"CVE-2023-40170","title":"cross-site inclusion (XSSI) of files in jupyter-server","description":"jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.","status":"published","published":"2023-08-28T20:01:57.156Z","modified":"2026-10-28T02:30:37.770428541Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-284","CWE-306"],"updated_at":"2026-11-02T15:44:33.244128Z"},{"id":"DEBIAN-CVE-2023-40170","description":"jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.","status":"published","published":"2023-08-28T21:15:07.873Z","modified":"2026-10-26T18:02:32.012277036Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:39.980321Z"},{"id":"GHSA-64x5-55rw-9974","title":"cross-site inclusion (XSSI) of files in jupyter-server","description":"### Impact\n\nImproper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\".\n\n### Patches\n\nJupyter Server 2.7.2\n\n### Workarounds\n\nUse lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.\n\n### References\n\nUpstream patch for CVE-2019-9644 was not applied completely, leaving part of the vulnerability open.\n\nVulnerability reported by Tim Coen via the [bug bounty program](https://app.intigriti.com/programs/jupyter/jupyter/detail) [sponsored by the European Commission](https://commission.europa.eu/news/european-commissions-open-source-programme-office-starts-bug-bounties-2022-01-19_en) and hosted on the [Intigriti platform](https://www.intigriti.com/).","status":"published","published":"2023-08-29T23:34:09Z","modified":"2026-09-10T03:49:57.417478394Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-284","CWE-306","CWE-79"],"updated_at":"2026-11-02T15:46:39.266402Z"},{"id":"PYSEC-2023-157","description":"jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via  \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.","status":"published","published":"2023-08-28T21:15:00Z","modified":"2023-11-08T04:13:19.479699Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:53.837392Z"},{"id":"UBUNTU-CVE-2023-40170","description":"jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via \"Open image in new tab\". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.","status":"published","published":"2023-08-28T21:15:00Z","modified":"2026-10-17T12:56:25.665551077Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T16:54:22.741943Z"},{"id":"openSUSE-SU-2024:13260-1","title":"python310-jupyter-server-2.7.3-1.1 on GA media","description":"These are all security issues fixed in the python310-jupyter-server-2.7.3-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:54:33.21634Z","updated_at":"2026-11-02T16:58:36.025801Z"},{"id":"openSUSE-SU-2026:12012-1","title":"python313-jupyter-server-2.20.0-1.3 on GA media","description":"These are all security issues fixed in the python313-jupyter-server-2.20.0-1.3 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-04T00:00:00Z","modified":"2026-10-05T10:15:46.419411578Z","updated_at":"2026-11-02T16:58:40.245664Z"}]}}