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CVE-2026-86258 - nbviewer through 1.0.1 Path Traversal via LocalFileHandler

CVE ID : CVE-2026-86258 Published : Sept. 6, 2026, 1:17 p. m. • 7 hours, 32 minutes ago Description : nbviewer through 1. 0. 1 contains a path traversal vulnerability in LocalFileHandler. can_show() that uses string-prefix comparison instead of proper path validation. Attackers can read files from sibling directories outside the configured root by requesting paths that share the root as a textual prefix, disclosing unintended notebooks and credentials. Severity: 8.2 • HIGH Visit the link for more details, such as CVSS details, affected products, timeline, and more...

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