{"id":"CVE-2026-55961","summary":"wolfSSL_PKCS7_verify() reports success for degenerate (certs-only) PKCS#7 with no signer","details":"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.","modified":"2026-08-12T03:51:43.525315193Z","published":"2026-06-25T16:51:18.157Z","database_specific":{"cna_assigner":"wolfSSL","cwe_ids":["CWE-347"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55961.json"},"references":[{"type":"WEB","url":"https://www.wolfssl.com/docs/security-vulnerabilities/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55961.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55961"},{"type":"FIX","url":"https://github.com/wolfSSL/wolfssl/pull/10702"},{"type":"PACKAGE","url":"https://github.com/wolfSSL/wolfssl"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wolfssl/wolfssl","events":[{"introduced":"a7350b7d2ed15648443253cb39ad9195df184139"},{"fixed":"ac01707f552c611fbd135cc723b2682b3e7f80f2"}],"database_specific":{"cpe":"cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.15.7"},{"last_affected":"5.9.1"},{"fixed":"5.9.2"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["v5.9.1-stable","v5.9.0-stable","v5.8.4-stable","wolfEntropy2d","v5.8.2-stable","wolfEntropy1","v5.8.0-stable","v5.7.6-stable","v5.7.4-stable","v5.2.1","v5.7.2-stable","v5.7.0-stable","v5.6.6-stable","v5.6.4-stable","WCv5.0-RC12","WCv5.0-RC11","WCv5.0-RC10","v5.6.2-stable","v5.6.3-stable","v5.6.0-stable","v5.5.4-stable","v5.5.3-stable","v5.5.2-stable","v5.5.1-stable","v5.5.0-stable","v5.4.0-stable","v5.3.0-stable","v5.2.0-stable","v5.1.0-stable","v5.0.0-stable","WCv5.0-RC9","v4.8.0-stable","v4.7.1r","v4.7.0-stable","v4.6.0-stable","v4.5.0-stable","v4.4.0-stable","v4.3.0-stable","v4.2.0c","v4.2.0-stable","v4.1.0-stable","v4.0.0-stable","list","v3.15.7-stable"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55961.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"}]}