CVE-2026-11999 X.509 trust-chain bypass via path-depth exhaustion in wolfSSL_X509_verify_cert()

X.509 trust-chain bypass path-depth exhaustion in the OpenSSL compatibility certificate verifier wolfSSLX509verifycert. This affects only builds with --enable-opensslextra whose application calls X509verifycert with caller-supplied untrusted intermediates; for those users it is critical, otherwis...

CVE-2026-11999

X.509 trust-chain bypass path-depth exhaustion in the OpenSSL compatibility certificate verifier wolfSSLX509verifycert. This affects only builds with --enable-opensslextra whose application calls X509verifycert with caller-supplied untrusted intermediates; for those users it is critical, otherwis...

CVE-2026-55961 wolfSSL_PKCS7_verify() reports success for degenerate (certs-only) PKCS#7 with no signer

wolfSSLPKCS7verify returning success for a degenerate certs-only PKCS7 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...

CVE-2026-55961

The CVE describes a flaw in wolfSSL where wolfSSL_PKCS7_verify() incorrectly reported success for a degenerate PKCS#7 object that contains no signer. In such objects, signerInfos is empty, so underlying signed-data verification could succeed without authenticating any content. The fix enforces th...

CVE-2026-6091

Partial-chain certificate verification may accept chains that terminate at a peer-supplied, untrusted intermediate certificate rather than a trusted anchor. An attacker could present a chain that ends at an intermediate they control and have it accepted as valid. This affects the OpenSSL...

CVE-2026-6091

Partial-chain certificate verification may accept chains that terminate at a peer-supplied, untrusted intermediate certificate rather than a trusted anchor. An attacker could present a chain that ends at an intermediate they control and have it accepted as valid. This affects the OpenSSL...

CVE-2026-6291

Bleichenbacher padding oracle in PKCS7 KTRI decryption. When decrypting PKCS7 EnvelopedData using RSA PKCS1 v1.5 key transport, wolfSSL returned distinguishable error codes depending on whether RSA padding validation failed versus whether the decrypted content was malformed. An attacker able to...

CVE-2026-6291 Bleichenbacher padding oracle in PKCS#7 KTRI RSA PKCS#1 v1.5 decryption

Bleichenbacher padding oracle in PKCS7 KTRI decryption. When decrypting PKCS7 EnvelopedData using RSA PKCS1 v1.5 key transport, wolfSSL returned distinguishable error codes depending on whether RSA padding validation failed versus whether the decrypted content was malformed. An attacker able to...

CVE-2026-6681: Out-of-bounds Write

The PKCS7 decode path ignores the caller-supplied output buffer size outputSz, allowing decoded content to be written past the bounds of the provided buffer. This affects wolfSSL 5.9.0 and earlier and was fixed in the 5.9.1 release...

CVE-2026-6091: Improper Certificate Validation

Partial-chain certificate verification may accept chains that terminate at a peer-supplied, untrusted intermediate certificate rather than a trusted anchor. An attacker could present a chain that ends at an intermediate they control and have it accepted as valid. This affects the OpenSSL...

PT-2026-52563

Name of the Vulnerable Software and Affected Versions wolfSSL affected versions not specified Description An X.509 trust-chain bypass exists in the OpenSSL compatibility certificate verifier function wolfSSL X509 verify cert. This issue occurs in builds configured with --enable-opensslextra OPENS...

CVE-2026-10097: Incorrect Comparison

wolfSSL's AVX2-optimized ML-KEM implementation mlkemcmpavx2 compares only 1536 of the 1568 ciphertext bytes during the Fujisaki-Okamoto re-encryption check in ML-KEM-1024 decapsulation. Ciphertexts that differ from the expected re-encryption solely in bytes 1536-1567 bypass implicit rejection and...

CVE-2026-8720: Improper Validation of Integrity Check Value

wcBlake2bHmacFinal and wcBlake2sHmacFinal discard the message when the key length exceeds the block size, producing a MAC that is independent of the input. When the supplied key is longer than the BLAKE2 block size the key-hashing branch reinitialized the running hash state, discarding the...

PT-2026-52587

Name of the Vulnerable Software and Affected Versions wolfSSL versions prior to 5.9.1 Description A heap buffer overflow occurs in the DTLS 1.3 ACK serialization path before the connecting peer is authenticated. The issue stems from an integer truncation when calculating the length of the ACK...

PT-2026-52623

Name of the Vulnerable Software and Affected Versions wolfSSL affected versions not specified Description A configuration issue occurs when WOLFSSL IP ALT NAME is not defined, leading to a bypass of iPAddress name constraints. In this state, the software fails to enforce IP address constraints se...

CVE-2026-10098: Improper Certificate Validation

OCSP CertID serial-number length-confusion in wolfSSLOCSPrespfindstatus allows a same-issuer SingleResponse whose serial is a prefix of the target serial to be reported as the revocation status of a different certificate. The lookup compared serial-number bytes without first requiring the two...

CVE-2026-55962: Improper Authentication

TLS 1.3 post-handshake authentication PHA issue where a server could accept a client's Finished message without the client having sent a Certificate and CertificateVerify. The post-handshake-auth exemption that allows an empty/absent peer certificate was only intended for the initial handshake, b...

CVE-2026-6291: Observable Timing Discrepancy

Bleichenbacher padding oracle in PKCS7 KTRI decryption. When decrypting PKCS7 EnvelopedData using RSA PKCS1 v1.5 key transport, wolfSSL returned distinguishable error codes depending on whether RSA padding validation failed versus whether the decrypted content was malformed. An attacker able to...

PT-2026-52590

Name of the Vulnerable Software and Affected Versions wolfSSL affected versions not specified Description A length-confusion issue exists in the wolfSSL OCSP resp find status function. The lookup process compares serial-number bytes without verifying that the two serial numbers are of equal lengt...

CVE-2026-7532: Improper Certificate Validation

iPAddress name constraints bypass when WOLFSSLIPALTNAME is not defined. IP address name constraints are not enforced in that configuration, allowing a certificate to bypass an issuing CA's IP address constraints...