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CVE-2026-5422

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6a9be42d4a5aca9151e7bbe7551f3105fe71c0b95d2743e68660b468d45718d1
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"jupyter/jupyter","vendor":"jupyter","versions":[{"lessThanOrEqual":"latest","status":"affected","version":"unspecified","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e1417b168c73cdadaea5997e9036039581e227f6985cf1515fe6f72090d91c95 · sha256:f1c86b285132f927… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e1417b168c73cdadaea5997e9036039581e227f6985cf1515fe6f72090d91c95 · sha256:f1c86b285132f927… · /containers/cna/metrics/0/cvssV3_0

CWE assertions

1 source assertion
{"cweId":"CWE-23","description":"CWE-23 Relative Path Traversal","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e1417b168c73cdadaea5997e9036039581e227f6985cf1515fe6f72090d91c95 · sha256:f1c86b285132f927… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"url":"https://huntr.com/bounties/24a36953-6490-466f-8cb2-a90d1ca56e0f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e1417b168c73cdadaea5997e9036039581e227f6985cf1515fe6f72090d91c95 · sha256:f1c86b285132f927… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://huntr.com/bounties/24a36953-6490-466f-8cb2-a90d1ca56e0f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e1417b168c73cdadaea5997e9036039581e227f6985cf1515fe6f72090d91c95 · sha256:f1c86b285132f927… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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