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CVE-2026-40171

In Jupyter Notebook versions 7.0.0 through 7.5.5, JupyterLab versions 4.5.6 and earlier, and the corresponding @jupyter-notebook/help-extension and @jupyterlab/help-extension packages before 7.5.6 and 4.5.7, a stored cross-site scripting issue in the help command linker can be chained with attacker-controlled notebook content to steal authentication tokens with a single click. An attacker can craft a malicious notebook file containing elements that appear indistinguishable from legitimate contr
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bdce0ece96af6659ae5ed704e30363ee5ffc0818ff42f09042f12809bea8ecae
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 4 assertions

{"product":"help-extension","vendor":"jupyterlab","versions":[{"status":"affected","version":"<=4.5.6"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/affected/1

{"product":"notebook","vendor":"jupyter","versions":[{"status":"affected","version":">=7.0.0, <= 7.5.5"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/affected/0

{"product":"help-extension","vendor":"jupyter-notebook","versions":[{"status":"affected","version":">=7.0.0,<= 7.5.5"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/affected/3

{"product":"jupyterlab","vendor":"jupyterlab","versions":[{"status":"affected","version":"<= 4.5.6"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/affected/2

Affected products and versions

4 source assertions
{"product":"help-extension","vendor":"jupyterlab","versions":[{"status":"affected","version":"<=4.5.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/affected/1
{"product":"notebook","vendor":"jupyter","versions":[{"status":"affected","version":">=7.0.0, <= 7.5.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/affected/0
{"product":"help-extension","vendor":"jupyter-notebook","versions":[{"status":"affected","version":">=7.0.0,<= 7.5.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/affected/3
{"product":"jupyterlab","vendor":"jupyterlab","versions":[{"status":"affected","version":"<= 4.5.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.4,"baseSeverity":"HIGH","privilegesRequired":"HIGH","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/jupyter/notebook/security/advisories/GHSA-rch3-82jr-f9w9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jupyter/notebook/security/advisories/GHSA-rch3-82jr-f9w9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b23f22d25cdb4ffedb11e18072463294cd859cd51ac859c855a52a0ed2a4064e · sha256:c7595cb52684f6ee… · /containers/cna/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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