CVE-2026-86258
MEDIUM5.9CVSS v3
—CVSS v2
0.36%
EPSS (exploit probability)
CWE-22CWE
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.
CVSS v3 vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected routers (0)
No routers currently mapped to this CVE in our database.