Missing Cryptographic Step Affecting openssl package, versions [3.0.5,3.1.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-OPENSSL-17277138
- published10 Jun 2026
- disclosed9 Jun 2026
- creditAlex Gaynor
Introduced: 9 Jun 2026
NewCVE-2026-45445 (opens in a new tab)How to fix?
Upgrade openssl to version 3.1.0 or higher.
Overview
Affected versions of this package are vulnerable to Missing Cryptographic Step in the AES-OCB provider when an application uses the EVP_Cipher() interface. The handler silently discards the IV, so every message under a given key runs with the all-zero offset state, causing nonce reuse. If EVP_EncryptFinal_ex() is then used to obtain the tag, the deferred IV setup clears the running checksum, so the tag depends only on (key, IV) and verifies against any ciphertext produced under that pair, allowing universal forgery from a single captured message. TLS is unaffected, since AES-OCB is not a TLS cipher suite and libssl does not call EVP_Cipher().