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CVE-2026-39378

The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. In versions 6.5 through 7.17.0, when `HTMLExporter.embed_images=True`, nbconvert's markdown renderer allows arbitrary file read via path traversal in image references. A malicious notebook can exfiltrate sensitive files from the conversion host by embedding them as base64 data URIs in the output HTML. nbconvert 7.17.1 contains a fix. As a workaround, do not enable `HTMLExporter.embed_i
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:783aad8b1f9f9f7c255ca0a6897bc03ed8ad8124b459c712a5d1f35ba48cef29
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"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:v2:8738e7ea7a74f92c3b62d17b3b210eaeded831a5e45b40f1d448886f805b262c · sha256:3af16ff06d12f13b… · /containers/cna/problemTypes/0/descriptions/0

{"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:v2:8738e7ea7a74f92c3b62d17b3b210eaeded831a5e45b40f1d448886f805b262c · sha256:3af16ff06d12f13b… · /containers/cna/problemTypes/1/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:v2:8738e7ea7a74f92c3b62d17b3b210eaeded831a5e45b40f1d448886f805b262c · sha256:3af16ff06d12f13b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8738e7ea7a74f92c3b62d17b3b210eaeded831a5e45b40f1d448886f805b262c · sha256:3af16ff06d12f13b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"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:v2:8738e7ea7a74f92c3b62d17b3b210eaeded831a5e45b40f1d448886f805b262c · sha256:3af16ff06d12f13b… · /containers/cna/problemTypes/0/descriptions/0
{"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:v2:8738e7ea7a74f92c3b62d17b3b210eaeded831a5e45b40f1d448886f805b262c · sha256:3af16ff06d12f13b… · /containers/cna/problemTypes/1/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:v2:8738e7ea7a74f92c3b62d17b3b210eaeded831a5e45b40f1d448886f805b262c · sha256:3af16ff06d12f13b… · /containers/cna/references/1
{"name":"https://github.com/jupyter/nbconvert/security/advisories/GHSA-7jqv-fw35-gmx9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jupyter/nbconvert/security/advisories/GHSA-7jqv-fw35-gmx9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8738e7ea7a74f92c3b62d17b3b210eaeded831a5e45b40f1d448886f805b262c · sha256:3af16ff06d12f13b… · /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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