Shodan
Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-55961

wolfSSL_PKCS7_verify() returning success for a degenerate (certs-only) PKCS#7 object that contains no signer. Such an object has empty signerInfos, so the underlying signed-data verification succeeds without authenticating any content. The compatibility-layer verify path now rejects the object when no signer signature has actually been verified, so a PKCS#7 carrying no valid signature is no longer reported as verified. This is enforced regardless of the PKCS7_NOVERIFY flag, which only suppresses signer certificate chain validation and was never intended to waive the requirement that a signature exist. Only affects OpenSSL compatibility builds that call the PKCS7_verify() compatibility API on potentially degenerate PKCS#7 bundles.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 0.9%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-55961


Products
Pricing
Contact Us

Shodan ® - All rights reserved