EUVD-2026-91990

In Bouncy Castle for Java before 1.86, neither copy of PKIXCertPathReviewer - org.bouncycastle.pkix.jcajce.PKIXCertPathReviewer nor the legacy org.bouncycastle.x509.PKIXCertPathReviewer - applied X.509 name constraints to the end-entity certificate. checkNameConstraints walked the path with a loo...

CVE-2026-71889

Bouncy Castle for Java contains a vulnerability where the PKIXCertPathReviewer (both org.bouncycastle.pkix.jcajce.PKIXCertPathReviewer and the legacy org.bouncycastle.x509.PKIXCertPathReviewer) fails to apply X.509 name constraints to the end-entity certificate. The root cause is that checkNameCo...

PT-2026-104136

Improper certificate validation in the directoryName name-constraint check PkixNameConstraintValidator.WithinDNSubtree in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows an attacker who controls, or can have certificates issued by, a name-constrained intermediate CA to get...

MUT-BC-SS-01

MUT-BC-SS-01: Mutation Testing of X.509 BasicConstraints in OpenSSL Overview This repository implements a specification-driven mutation testing experiment targeting X.509 certificate validation behavior in OpenSSL. The experiment is based on the mutation operator: MUT-BC-SS-01 which modifies the...

UBUNTU-CVE-2026-55964

Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA. Intermediate CA certificates are required to have the keyCertSign key usage when a Key Usage extension is present, but chain-supplied temporary CAs WOLFSSLTEMPCA added while building a certificate path were previously exempt...

CVE-2026-55964 Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA (temporary CA exemption)

Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA. Intermediate CA certificates are required to have the keyCertSign key usage when a Key Usage extension is present, but chain-supplied temporary CAs WOLFSSLTEMPCA added while building a certificate path were previously exempt...

CVE-2026-55964 Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA (temporary CA exemption)

Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA. Intermediate CA certificates are required to have the keyCertSign key usage when a Key Usage extension is present, but chain-supplied temporary CAs WOLFSSLTEMPCA added while building a certificate path were previously exempt...

CVE-2026-33896: Improper Certificate Validation

Forge also called node-forge is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, pki.verifyCertificateChain does not enforce RFC 5280 basicConstraints requirements when an intermediate certificate lacks both the basicConstraints and keyUsage extensions...

GO-2022-0434 Panic during certificate parsing on Darwin in crypto/x509

Verifying certificate chains containing certificates which are not compliant with RFC 5280 causes Certificate.Verify to panic on macOS. These chains can be delivered through TLS and can cause a crypto/tls or net/http client to crash...

openSUSE: Security Advisory for openssl-1_1 (openSUSE-SU-2018:3013-1)

The remote host is missing an update for the Copyright C 2018 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

Security update for openssl-1_1 (moderate)

This update for openssl-11 to 1.1.0i fixes the following issues: These security issues were fixed: - CVE-2018-0732: During key agreement in a TLS handshake using a DHE based ciphersuite a malicious server could have sent a very large prime value to the client. This caused the client to spend an...

Security Only update for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 updates for Windows Server 2012 (KB 4055270)

Security Only update for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 updates for Windows Server 2012 KB 4055270 View products that this article applies to. Important If you have not been offered this security update, you may be running incompatible antivirus software, and...

Description of Security and Quality Rollup for .NET Framework 3.5 SP1 for Windows Server 2012 (KB 4054997)

Description of Security and Quality Rollup for .NET Framework 3.5 SP1 for Windows Server 2012 KB 4054997 Notice This update is included in the February 2018 Preview of the Quality Rollups for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows Server 2012 KB 4074806. Part...

Description of the Security Only update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows Server 2012 (KB 4054181)

Description of the Security Only update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows Server 2012 KB 4054181 View products that this article applies to. Summary This security update resolves a security feature bypass vulnerability that exists when Microsoft .NET Framework and...

ruby: permissive certificate verification

After reviewing RFC 6125 and RFC 5280, multiple violations were found of matching hostnames and particularly wildcard certificates. Rubys OpenSSL extension will now provide a string-based matching algorithm which follows more strict behavior, as recommended by these RFCs. In particular, matching ...

FreeBSD : Ruby -- OpenSSL Hostname Verification Vulnerability (d4379f59-3e9b-49eb-933b-61de4d0b0fdb)

Ruby Developers report : After reviewing RFC 6125 and RFC 5280, we found multiple violations of matching hostnames and particularly wildcard certificates. Ruby's OpenSSL extension will now provide a string-based matching algorithm which follows more strict behavior, as recommended by these RFCs. ...

Ruby OpenSSL Hostname Verification

After reviewing RFC 6125 and RFC 5280, we found multiple violations of matching hostnames and particularly wildcard certificates. Ruby’s OpenSSL extension will now provide a string-based matching algorithm which follows more strict behavior, as recommended by these RFCs. In particular, matching o...

Ruby -- OpenSSL Hostname Verification Vulnerability

Ruby Developers report: After reviewing RFC 6125 and RFC 5280, we found multiple violations of matching hostnames and particularly wildcard certificates. Ruby’s OpenSSL extension will now provide a string-based matching algorithm which follows more strict behavior, as recommended by these RFCs. I...

SSL Certificate Fails to Adhere to Basic Constraints / Key Usage Extensions

An X.509 certificate sent by the remote host contains one or more violations of the restrictions imposed on it by RFC 5280. This means that either a root or intermediate Certificate Authority signed a certificate incorrectly. Certificates that fail to adhere to the restrictions in their extension...