CVE-2026-55961
wolfSSL_PKCS7_verify() reports success for degenerate (certs-only) PKCS#7 with no signer
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.
| CWE | CWE-347 |
| Vendor | wolfssl |
| Product | wolfssl |
| Published | Jun 25, 2026 |
| Last Updated | Jun 25, 2026 |
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