CVE-2026-45784: Sfackler OpenSSL

High severity, CVSS 7.1. EPSS: 0.1% chance of exploitation in the next 30 days.

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.10.50 until 0.10.80, CipherCtxRef::cipher_update_inplace in openssl/src/cipher_ctx.rs incorrectly sized output buffers when used with AES key-wrap-with-padding ciphers EVP_aes_{128,192,256}_wrap_pad. For a non-multiple-of-8 input, OpenSSL writes up to 7 bytes past the end of the caller's buffer or Vec, producing attacker-controllable heap corruption when the plaintext length is attacker-influenced. This issue is fixed in version 0.10.80.

Affected products

• Sfackler OpenSSL: from 0.10.50, before 0.10.80 (fixed in 0.10.80)

Published 2026-07-17. Last modified 2026-07-29.