CVE-2020-36317: Rust-Lang Rust

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

In the standard library in Rust before 1.49.0, String::retain() function has a panic safety problem. It allows creation of a non-UTF-8 Rust string when the provided closure panics. This bug could result in a memory safety violation when other string APIs assume that UTF-8 encoding is used on the same string.

Affected products

• Rust-Lang Rust: before 1.49.0 (fixed in 1.49.0)

Published 2021-04-11. Last modified 2026-06-17.