CVE Explorer

CVE-2026-39377

The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. Versions 6.5 through 7.17.0 allow arbitrary file writes to locations outside the intended output directory when processing notebooks containing crafted cell attachment filenames. The `ExtractAttachmentsPreprocessor` passes attachment filenames directly to the filesystem without sanitization, enabling path traversal attacks. This vulnerability provides complete control over both the des

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:04e4a8495551ae9582d01cdd560e3e24396ea001ce07efeb02d2814899f66c92

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0f1b747c06cc610de1e3e876fc2ba77af81170dc2de34948a63d28100de278a7 · sha256:6f830a73ae10f08a… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0f1b747c06cc610de1e3e876fc2ba77af81170dc2de34948a63d28100de278a7 · sha256:6f830a73ae10f08a… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"product":"nbconvert","vendor":"jupyter","versions":[{"status":"affected","version":">= 6.5, < 7.17.1"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:0f1b747c06cc610de1e3e876fc2ba77af81170dc2de34948a63d28100de278a7 · sha256:6f830a73ae10f08a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:0f1b747c06cc610de1e3e876fc2ba77af81170dc2de34948a63d28100de278a7 · sha256:6f830a73ae10f08a… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0f1b747c06cc610de1e3e876fc2ba77af81170dc2de34948a63d28100de278a7 · sha256:6f830a73ae10f08a… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0f1b747c06cc610de1e3e876fc2ba77af81170dc2de34948a63d28100de278a7 · sha256:6f830a73ae10f08a… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/jupyter/nbconvert/releases/tag/v7.17.1","tags":["x_refsource_MISC"],"url":"https://github.com/jupyter/nbconvert/releases/tag/v7.17.1"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0f1b747c06cc610de1e3e876fc2ba77af81170dc2de34948a63d28100de278a7 · sha256:6f830a73ae10f08a… · /containers/cna/references/1

{"name":"https://github.com/jupyter/nbconvert/security/advisories/GHSA-4c99-qj7h-p3vg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jupyter/nbconvert/security/advisories/GHSA-4c99-qj7h-p3vg"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0f1b747c06cc610de1e3e876fc2ba77af81170dc2de34948a63d28100de278a7 · sha256:6f830a73ae10f08a… · /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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