JLSEC-2026-688 Multiple constant-time implementations in wolfSSL before version 5.8.4 may be transformed into...

Multiple constant-time implementations in wolfSSL before version 5.8.4 may be transformed into non-constant-time binary by LLVM optimizations, which can potentially result in observable timing discrepancies and lead to information disclosure through timing side-channel attacks...

JLSEC-2026-704 Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in...

Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required keyshare extension,...

JLSEC-2026-729 wolfSSL's `wc_PKCS7_DecodeAuthEnvelopedData()` does not properly sanitize the AES-GCM authentication...

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...

JLSEC-2026-724 X.509 date buffer overflow in `wolfSSL_X509_notAfter` / `wolfSSL_X509_notBefore`

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...

JLSEC-2026-676 If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key share extension)...

If a TLS 1.3 client gets neither a PSK pre shared key extension nor a KSE key share extension when connecting to a malicious server, a default predictable buffer gets used for the IKM Input Keying Material value when generating the session master secret. Using a potentially known IKM value when...

JLSEC-2026-677 wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing...

wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher style attack, when built with the following options to configure: --enable-all CFLAGS="-DWOLFSSLSTATICRSA" The define “WOLFSSLSTATICRSA” enables static RSA cipher suites, which is n...

JLSEC-2026-703

An integer overflow vulnerability existed in the static function wolfssladdtochain, that caused heap corruption when certificate data was written out of bounds of an insufficiently sized certificate buffer. wolfssladdtochain is called by these API: wolfSSLCTXaddextrachaincert,...

DEBIAN-CVE-2026-54919

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIBMBEDTLSSUPPORT or CPPHTTPLIBWOLFSSLSUPPORT and a...

CVE-2026-54919

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIBMBEDTLSSUPPORT or CPPHTTPLIBWOLFSSLSUPPORT and a...

EUVD-2026-42942

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIBMBEDTLSSUPPORT or CPPHTTPLIBWOLFSSLSUPPORT and a...

CVE-2026-54919 cpp-httplib: TLS certificate chain verification bypassed for IP-literal hosts on Mbed TLS and wolfSSL backends

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIBMBEDTLSSUPPORT or CPPHTTPLIBWOLFSSLSUPPORT and a...

CVE-2026-54919 cpp-httplib: TLS certificate chain verification bypassed for IP-literal hosts on Mbed TLS and wolfSSL backends

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIBMBEDTLSSUPPORT or CPPHTTPLIBWOLFSSLSUPPORT and a...

CVE-2026-54919

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIBMBEDTLSSUPPORT or CPPHTTPLIBWOLFSSLSUPPORT and a...

CVE-2026-54919

cpp-httplib on Mbed TLS and wolfSSL backends was vulnerable to a TLS certificate chain verification bypass for IP-literal hosts (affecting v0.31.0–0.46.1) when server verification was enabled; SSLClient/Client could skip chain validation and Mbed TLS WebSocketClient could skip verification. The i...

CVE-2026-54919 cpp-httplib: TLS certificate chain verification bypassed for IP-literal hosts on Mbed TLS and wolfSSL backends

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIBMBEDTLSSUPPORT or CPPHTTPLIBWOLFSSLSUPPORT and a...

PT-2026-57218

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIB MBEDTLS SUPPORT or CPPHTTPLIB WOLFSSL SUPPORT and a...

PYSEC-2026-1066 wolfCrypt leaks cryptographic information via timing side channel

wolfSSL and wolfCrypt 4.0.0 and earlier when configured without --enable-fpecc, --enable-sp, or --enable-sp-math contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about th...

Fedora 43 : cpp-httplib (2026-1d4bd0354a)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1d4bd0354a advisory. Update to 0.48.0 rhbz2481109 Security fixes - Complete the IP-host certificate identity fix from v0.47.0 for the Mbed TLS and wolfSSL backends. An...

Fedora 44 : cpp-httplib (2026-1b15ac058b)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1b15ac058b advisory. Update to 0.48.0 rhbz2481109 Security fixes - Complete the IP-host certificate identity fix from v0.47.0 for the Mbed TLS and wolfSSL backends. An...

WolfSSL wolfSSL X.509 iPAddress name constraints enforcement improper input validation vulnerability

Summary A improper input validation vulnerability exists in the X.509 iPAddress name constraints enforcement functionality of wolfSSL versions: 5.9.1. A specially crafted X.509 certificate chain can lead to bypass of iPAddress name constraints. An attacker can present a certificate with an IP SAN...