EUVD-2026-21228

A stack buffer overflow exists in wolfSSL's PKCS7 implementation in the wcPKCS7DecryptOri function in wolfcrypt/src/pkcs7.c. When processing a CMS EnvelopedData message containing an OtherRecipientInfo ORI recipient, the function copies an ASN.1-parsed OID into a fixed 32-byte stack buffer...

EUVD-2026-21233

X.509 date buffer overflow in wolfSSLX509notAfter / wolfSSLX509notBefore. A buffer overflow may occur when parsing date fields from a crafted X.509 certificate via the compatibility layer API. This is only triggered when calling these two APIs directly from an application, and does not affect TLS...

CVE-2026-5460

A heap use-after-free exists in wolfSSL's TLS 1.3 post-quantum cryptography PQC hybrid KeyShare processing. In the error handling path of TLSXKeyShareProcessPqcHybridClient in src/tls.c, the inner function TLSXKeyShareProcessPqcClientex frees a KyberKey object upon encountering an error. The call...

DEBIAN-CVE-2026-5460

A heap use-after-free exists in wolfSSL's TLS 1.3 post-quantum cryptography PQC hybrid KeyShare processing. In the error handling path of TLSXKeyShareProcessPqcHybridClient in src/tls.c, the inner function TLSXKeyShareProcessPqcClientex frees a KyberKey object upon encountering an error. The call...

DEBIAN-CVE-2026-5393

Dual-Algorithm CertificateVerify out-of-bounds read. When processing a dual-algorithm CertificateVerify message, an out-of-bounds read can occur on crafted input. This can only occur when --enable-experimental and --enable-dual-alg-certs is used when building wolfSSL...

DEBIAN-CVE-2026-5448

X.509 date buffer overflow in wolfSSLX509notAfter / wolfSSLX509notBefore. A buffer overflow may occur when parsing date fields from a crafted X.509 certificate via the compatibility layer API. This is only triggered when calling these two APIs directly from an application, and does not affect TLS...

UBUNTU-CVE-2026-5393

Dual-Algorithm CertificateVerify out-of-bounds read. When processing a dual-algorithm CertificateVerify message, an out-of-bounds read can occur on crafted input. This can only occur when --enable-experimental and --enable-dual-alg-certs is used when building wolfSSL...

UBUNTU-CVE-2026-5448

X.509 date buffer overflow in wolfSSLX509notAfter / wolfSSLX509notBefore. A buffer overflow may occur when parsing date fields from a crafted X.509 certificate via the compatibility layer API. This is only triggered when calling these two APIs directly from an application, and does not affect TLS...

UBUNTU-CVE-2026-5460

A heap use-after-free exists in wolfSSL's TLS 1.3 post-quantum cryptography PQC hybrid KeyShare processing. In the error handling path of TLSXKeyShareProcessPqcHybridClient in src/tls.c, the inner function TLSXKeyShareProcessPqcClientex frees a KyberKey object upon encountering an error. The call...

Out-of-bounds Read

Overview Affected versions of this package are vulnerable to Out-of-bounds Read via the PKCS7VerifySignedData process. An attacker can cause the application to read memory outside the bounds of a heap buffer by submitting a specially crafted PKCS7 message. Remediation Upgrade wolfssl to version...

Out-of-bounds Write

Overview Affected versions of this package are vulnerable to Out-of-bounds Write through improper handling of the publicName parameter in the TLSXEchChangeSNI process. An attacker can cause memory corruption or potentially execute arbitrary code by supplying a specially crafted value that leads t...

Heap-based Buffer Overflow

Overview Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the wolfSSLX509notAfter or wolfSSLX509notBefore functions when parsing date fields from a specially crafted X.509 certificate via the compatibility layer API. An attacker can cause a buffer overflow by...

Improper Validation of Integrity Check Value

Overview Affected versions of this package are vulnerable to Improper Validation of Integrity Check Value via the PKCS7 CBC decryption process. An attacker can recover plaintext data by sending repeated decryption queries with modified ciphertext, exploiting improper validation of interior paddin...

CVE-2026-5393: Out-of-bounds Read

Dual-Algorithm CertificateVerify out-of-bounds read. When processing a dual-algorithm CertificateVerify message, an out-of-bounds read can occur on crafted input. This can only occur when --enable-experimental and --enable-dual-alg-certs is used when building wolfSSL...

wolfSSL 安全漏洞

wolfSSL CyaSSL is a small, portable embedded SSL programming library developed by the American company wolfSSL, aimed at developers working with embedded systems. There is a security vulnerability in wolfSSL. This vulnerability stems from the wolfSSLX509verifycert function within the OpenSSL...

wolfSSL（CyaSSL） 安全漏洞

WolfSSL CyaSSL is a small, portable embedded SSL programming library developed by the American company wolfSSL, designed for developers working with embedded systems. WolfSSL CyaSSL contains a security vulnerability. This vulnerability stems from the ChaCha20-Poly1305 AEAD decryption path in...

wolfSSL（CyaSSL） 安全漏洞

wolfSSL CyaSSL is a small, portable embedded SSL programming library developed by the US company wolfSSL, designed for developers working with embedded systems. wolfSSL CyaSSL contains a security vulnerability that stems from the handling of mixed key sharing in TLS 1.3 and post-quantum...

CVE-2026-5479: Improper Validation of Integrity Check Value

In wolfSSL's EVP layer, the ChaCha20-Poly1305 AEAD decryption path in wolfSSLEVPCipherFinal and related EVP cipher finalization functions fails to verify the authentication tag before returning plaintext to the caller. When an application uses the EVP API to perform ChaCha20-Poly1305 decryption,...

CVE-2026-5500: Improper Input Validation

wolfSSL's wcPKCS7DecodeAuthEnvelopedData does not properly sanitize the AES-GCM authentication tag length received and has no lower bounds check. A man-in-the-middle can therefore truncate the mac field from 16 bytes to 1 byte, reducing the tag check from 2⁻¹²⁸ to 2⁻⁸...

CVE-2026-5188: Integer Underflow (Wrap or Wraparound)

An integer underflow issue exists in wolfSSL when parsing the Subject Alternative Name SAN extension of X.509 certificates. A malformed certificate can specify an entry length larger than the enclosing sequence, causing the internal length counter to wrap during parsing. This results in incorrect...