{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-39378","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-06T21:29:17.350Z","datePublished":"2026-04-21T00:17:00.684Z","dateUpdated":"2026-04-21T13:43:29.081Z"},"containers":{"cna":{"title":"nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding","problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-73","lang":"en","description":"CWE-73: External Control of File Name or Path","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"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"}}],"references":[{"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"},{"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"}],"affected":[{"vendor":"jupyter","product":"nbconvert","versions":[{"version":">= 6.5, < 7.17.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-21T00:17:00.684Z"},"descriptions":[{"lang":"en","value":"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_images`; it is not enabled by default."}],"source":{"advisory":"GHSA-7jqv-fw35-gmx9","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-21T13:43:09.070985Z","id":"CVE-2026-39378","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-21T13:43:29.081Z"}}]}}