{"api_version":"1","generated_at":"2026-04-21T10:53:15+00:00","cve":"CVE-2026-39378","urls":{"html":"https://cve.report/CVE-2026-39378","api":"https://cve.report/api/cve/CVE-2026-39378.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-39378","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-39378"},"summary":{"title":"nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding","description":"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. 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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_images`; it is not enabled by default.","Type":"Description","Title":"nbconvert has an Arbitrary File Read via Path Traversal in HTMLE"}]}}}