Log in Start free

Vulnerability · Published Jul 17, 2026 · Assigned by GitHub_M

CVE-2026-45784rust-openssl: Potential out-of-bounds write in `CipherCtxRef::cipher_update_inplace` for AES-KW-PAD ciphers

Medium 5.1

In plain English

A medium-severity out-of-bounds write in rust-openssl from rust-openssl. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)5.1Medium
Exploit odds (30 days)0.1%top 97.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13rust-opensslno fix listedDEBIAN-CVE-2026-45784
Debian:14rust-openssl0.10.81-1DEBIAN-CVE-2026-45784
Ubuntu:26.04:LTSrust-opensslno fix listedUBUNTU-CVE-2026-45784
Ubuntu:26.10rust-opensslno fix listedUBUNTU-CVE-2026-45784

Affected products (as reported)

VendorProductVersions
rust-openssl rust-openssl >= 0.10.50, < 0.10.80

Weakness: CWE-131, CWE-787 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

References