CVE-2021-23509: JSON-Ptr Project JSON-Ptr

Critical severity, CVSS 9.8. EPSS: 1.8% chance of exploitation in the next 30 days.

This affects the package json-ptr before 3.0.0. A type confusion vulnerability can lead to a bypass of CVE-2020-7766 when the user-provided keys used in the pointer parameter are arrays.

Affected products

• JSON-Ptr Project JSON-Ptr: before 3.0.0 (fixed in 3.0.0)

Published 2021-11-03. Last modified 2026-06-17.