Improper Initialization in OpenSSL - CVE-2026-45445
Published: June 10, 2026
Vulnerability identifier: #VU134275
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45445
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: OpenSSL Software Foundation
Affected software:
OpenSSL
OpenSSL
Detailed vulnerability description
The vulnerability allows a local user to forge arbitrary ciphertext.
The vulnerability exists due to improper initialization in the AES-OCB EVP_Cipher() one-shot path when processing AES-OCB operations through the public EVP_Cipher() interface. A local user can invoke the one-shot API on an AES-OCB context to forge arbitrary ciphertext.
Only applications that combine AES-OCB with the EVP_Cipher() one-shot API are affected; applications using the documented streaming AEAD API are not affected.
How to mitigate CVE-2026-45445
Install security update from vendor's website.