JLSEC-2026-755 X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name

X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted...

Linux Distros Unpatched Vulnerability : CVE-2026-6731

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name...

CVE-2026-6731

CVE-2026-6731 describes an X.509 name constraint bypass where the Subject CN is treated as a DNS-type name, allowing a certificate to pass DNS constraints if the CN violates them. Public sources (NVD and related feeds) reference this bypass and provide CVSS metrics (v3.1: 7.5, Network, High impac...

Security update for strongswan

This update for strongswan fixes the following issues: CVE-2026-35329: NULL pointer dereference when processing padding in PKCS7 bsc1261717. CVE-2026-35330: integer underflow when handling EAP-SIM/AKA attributes bsc1261705. CVE-2026-35331: acceptance of certificates violating X.509 name constrain...

PT-2026-35581

USN-8196-1 fixed vulnerabilities in strongSwan. This update provides the corresponding update to Ubuntu 26.04 LTS. Original advisory details: Haruto Kimura discovered that strongSwan incorrectly handled the supported versions extension in TLS. A remote attacker could possibly use this issue to...

PT-2026-35583

USN-8196-1 fixed vulnerabilities in strongSwan. This update provides the corresponding update to Ubuntu 26.04 LTS. Original advisory details: Haruto Kimura discovered that strongSwan incorrectly handled the supported versions extension in TLS. A remote attacker could possibly use this issue to...

CVE-2026-32884

Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by t...

AWS-LC X.509 Name Constraints Bypass via Wildcard/Unicode CN

Summary AWS-LC is an open-source, general-purpose cryptographic library. Impact A logic error in CN Common Name validation allows certificates with wildcard or raw UTF-8 Unicode CN values to bypass name constraints enforcement. The cn2dnsid function does not recognize these CN patterns as valid D...

AWS-LC X.509 Name Constraints Bypass via Wildcard/Unicode CN

A logic error in CN Common Name validation allows certificates with wildcard or raw UTF-8 Unicode CN values to bypass name constraints enforcement. The cn2dnsid function does not recognize these CN patterns as valid DNS identifiers, causing NAMECONSTRAINTScheckCN to skip validation. However,...

Security update for go1.26

This update for go1.26 fixes the following issues: Update to go1.26.1 bsc1255111: CVE-2026-25679: net/url: reject IPv6 literal not at start of host bsc1259264. CVE-2026-27137: crypto/x509: incorrect enforcement of email constraints bsc1259266. CVE-2026-27138: crypto/x509: panic in name constraint...

OPENSUSE-SU-2025:20158-1 Security update for go1.24

This update for go1.24 fixes the following issues: Update to go1.24.11. Security issues fixed: - CVE-2025-47912: net/url: insufficient validation of bracketed IPv6 hostnames bsc1251257. - CVE-2025-58183: archive/tar: unbounded allocation when parsing GNU sparse map bsc1251261. - CVE-2025-58185:...

EUVD-2022-4596

Malicious code in bioql PyPI...

RHEL 6 : ruby (Unpatched Vulnerability)

The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched. - ruby: Command injection vulnerability in Net::FTP CVE-2017-17405 - ruby: OpenSSL::X509::Name equality che...

SUSE CVE-2016-2176

The X509NAMEoneline function in crypto/x509/x509obj.c in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h allows remote attackers to obtain sensitive information from process stack memory or cause a denial of service buffer over-read via crafted EBCDIC ASN.1 data...

SUSE CVE-2018-16395

An issue was discovered in the OpenSSL library in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. When two OpenSSL::X509::Name objects are compared using ==, depending on the ordering, non-equal objects may return true. When the first argument is one...

ARM mbed TLS 信任管理问题漏洞

ARM mbed TLS is a product from ARM UK that provides secure communication and encryption capabilities for mbed products. A security vulnerability exists in ARM mbed TLS prior to version 2.24.0, which stems from an error in the validation handling of X.509 certificates when matching the expected...

CVE-2021-3547

OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration...

CVE-2021-3547

OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration...

An issue was discovered in the OpenSSL library in Ruby before 2.3.8 2.4.x before 2.4.5 2.5.x before 2.5.2 and 2.6.x before 2.6.0-preview3. When two OpenSSL::X509::Name objects are compared using == depending on the ordering non-equal objects may return true. When the first argument is one character longer than the second or the second argument contains a character that is one less than a character in the same position of the first argument the result of == will be true. This could be leveraged to create an illegitimate certificate that may be accepted as legitimate and then used in signing or encryption operations.

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The vulnerability of the X509_NAME_oneline function (crypto/x509/x509_obj.c) in the OpenSSL library allows a hacker to gain unauthorized access to confidential data or cause service failures.

The vulnerability of the X509NAMEoneline function in the OpenSSL library is related to the execution of operations within acceptable buffer data limits. Exploitation of this vulnerability could allow a malicious actor to gain unauthorized access to confidential data or cause service failures...