CVE-2026-41681: Rust-OpenSSL Project Rust-OpenSSL

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.39 to before 0.10.78, EVP_DigestFinal() always writes EVP_MD_CTX_size(ctx) to the out buffer. If out is smaller than that, MdCtxRef::digest_final() writes past its end, usually corrupting the stack. This is reachable from safe Rust. This vulnerability is fixed in 0.10.78.

Affected products

• Rust-OpenSSL Project Rust-OpenSSL: from 0.10.39, before 0.10.78 (fixed in 0.10.78)

Published 2026-04-24. Last modified 2026-07-15.