{"id":"CVE-2022-29241","aliases":["GHSA-q874-g24w-4q9g","PYSEC-2022-211"],"title":"Jupyter server Token bruteforcing","summary":"Jupyter server Token bruteforcing","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H","vendor":"jupyter-server","product":"jupyter-server","ecosystem":"pip","affected":["jupyter-server < 1.17.1","jupyter-server >= 2.0.0a0, < 2.0.0a1"],"patched":["jupyter-server 1.17.1","jupyter-server 2.0.0a1"],"published":"2022-06-16","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:49:49.383978105Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-q874-g24w-4q9g","references":[{"url":"https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-q874-g24w-4q9g"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-29241"},{"url":"https://github.com/jupyter-server/jupyter_server/commit/3485007abbb459585357212dcaa20521989272e8"},{"url":"https://github.com/jupyter-server/jupyter_server/commit/877da10cd0d7ae45f8b1e385fa1f5a335e7adf1f"},{"url":"https://github.com/jupyter-server/jupyter_server"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2022-211.yaml"}],"tags":["osv","pip"],"epss":0.0093,"epssPercentile":0.58529,"ingestedAt":"2026-09-12T03:13:01.720Z","slug":"CVE-2022-29241","body":"## Overview\n\nAffects: Notebook and Lab between 6.4.0?(potentially earlier) and 6.4.11 (currently latest). Jupyter Server <=1.16.0. If I am correct about the responsible code it will affect Jupyter-Server 1.17.0 and 2.0.0a0 as well.\nDescription: If notebook server is started with a value of `root_dir` that contains the starting user's home directory, then the underlying REST API can be used to leak the access token assigned at start time by guessing/brute forcing the PID of the jupyter server. While this requires an authenticated user session, this url can be used from an xss payload (as in CVE-2021-32798) or from a hooked or otherwise compromised browser to leak this access token to a malicious third party. This token can be used along with the REST API to interact with Jupyter services/notebooks such as modifying or overwriting critical files, such as .bashrc or .ssh/authorized_keys, allowing a malicious user to read potentially sensitive data and possibly gain control of the impacted system.\n\n\n## Affected packages\n\n- `jupyter-server < 1.17.1`\n- `jupyter-server >= 2.0.0a0, < 2.0.0a1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `jupyter-server 1.17.1`\n- `jupyter-server 2.0.0a1`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}