Vulnerability in JupyterLab
Classification: Severe, Solution: Official Fix, Exploit Maturity: Not Defined, CVSSv3.1: 8.1, CVEs: CVE-2026-102831, Summary: JupyterLab 4.5.0 enabled copying and pasing cells through the system clipboard. The paste path parses clipboard text as cell JSON and inserts the cells without clearing metadata.trusted, so a payload can declare its own output as trusted. JupyterLab does not sanitize a trusted output and evaluates the elements it contains, so pasting the cell runs attacker's JavaScript…
EPSS < 0.01 CVSS 8.1 CVE-2026-102831 JupyterLab FI