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CVE-2026-22796 is a type confusion vulnerability in OpenSSL's legacy PKCS#7 signature verification path, specifically in the PKCS7_digest_from_attributes() function. The flaw occurs because the function accesses the message-digest attribute through an ASN1_TYPE union member without first validating that the attribute type is V_ASN1_OCTET_STRING. When malformed signed PKCS#7 data supplies an unexpected ASN.1 type, the code may dereference an invalid or NULL pointer while reading the digest value. This can be triggered during verification of signed PKCS#7 content or by direct invocation of PKCS7_digest_from_attributes(). Affected versions include OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1, and 1.0.2. The issue is assessed as low severity, and the OpenSSL FIPS modules for 3.5, 3.4, 3.3, and 3.0 are not affected because the vulnerable PKCS#7 parsing code is outside the FIPS module boundary.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
42 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in OpenSSL addressed indirectly through upgraded third-party components in Tenable Security Center.
A remote denial-of-service vulnerability affecting HPE Superdome Flex 280 and HPE Compute Scale-up Server 3200 platforms.
An OpenSSL vulnerability patched by upgrading to OpenSSL 3.6.1 in IPFire Core Update 200.
Unknown (listed among related OpenSSL CVEs, but not described 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.