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CVE-2026-45446 is a flaw in OpenSSL's provider implementations of AES-SIV and AES-GCM-SIV AEAD modes in which Additional Authenticated Data is not properly authenticated when decrypting a message with an empty ciphertext. During decryption, the expected authentication tag is only computed when the ciphertext update path is invoked with non-empty data. If an application supplies AAD and then calls EVP_DecryptFinal_ex() without first processing ciphertext data, as can occur when the received ciphertext length is zero, the internal tag value is never recomputed and remains all zeros. As a result, authentication can incorrectly succeed for crafted empty-ciphertext messages. AES-SIV is present since OpenSSL 3.0 and AES-GCM-SIV since OpenSSL 3.2. OpenSSL's own TLS, CMS, PKCS7, HPKE, and QUIC protocol implementations do not use these modes and are not directly affected.
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29 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OpenSSL vulnerability addressed in Alpine Linux 3.22.5 and 3.23.5 as part of the June 9, 2026 OpenSSL advisory.
An OpenSSL vulnerability addressed in Alpine Linux 3.24.1 as part of the June 9, 2026 advisory.
A low-severity OpenSSL authentication flaw in AES-SIV and AES-GCM-SIV handling of empty ciphertext messages, allowing forgery of empty messages with arbitrary AAD under certain application behaviors.
A security vulnerability in OpenSSL fixed by updating OpenSSL to version 3.5.7; no further details are provided in the content.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.