CVE-2018-20997: Rust-OpenSSL Project Rust-OpenSSL

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

An issue was discovered in the openssl crate before 0.10.9 for Rust. A use-after-free occurs in CMS Signing.

Affected products

• Rust-OpenSSL Project Rust-OpenSSL: before 0.10.9 (fixed in 0.10.9)

Published 2019-08-26. Last modified 2026-06-17.