CVE-2021-30456: Id-Map Project Id-Map

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

An issue was discovered in the id-map crate through 2021-02-26 for Rust. A double free can occur in get_or_insert upon a panic of a user-provided f function.

Affected products

• Id-Map Project Id-Map: up to and including 2021-02-26

Published 2021-04-07. Last modified 2026-06-17.