GHSA-RP2P-6CMP-JXJ9 Microsoft Security Advisory CVE-2026-57108 – .NET Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in the .NET runtime cryptography layer CryptoNativeGetX509NameInfo. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability...

crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries

A flaw was found in the crypto/x509 package of golang. This vulnerability allows a remote attacker to cause a Denial of Service DoS by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name SAN entries. The certificate verification process, specifical...

crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation

A flaw was found in Go's crypto/x509 package. A remote attacker could exploit this by presenting a specially crafted certificate chain containing a large number of policy mappings. This inefficient validation process consumes excessive resources, which can lead to a denial of service DoS for...

crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries

A flaw was found in the crypto/x509 package of golang. This vulnerability allows a remote attacker to cause a Denial of Service DoS by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name SAN entries. The certificate verification process, specifical...

crypto/x509: Incorrect enforcement of email constraints in crypto/x509

A certificate validation flaw has been discovered in the golang crypto/x509 module. When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly...

crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate

A flaw was found in golang. A remote attacker could exploit this vulnerability by providing a specially crafted certificate during the error string construction process within the HostnameError.Error function. This flaw, caused by unbounded string concatenation, leads to excessive resource...

openSUSE 16 Security Update : go1.25-openssl (openSUSE-SU-2026:21319-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21319-1 advisory. This update for go1.25-openssl fixes the following issues - Update to version go1.25.12 bsc1244485. - CVE-2025-61732: cmd/cgo: discrepancy betwe...

kernel security, bug fix, and enhancement update

6.12.0-211.34.1 - Add new Oracle Linux Driver Signing key 1 certificate Orabug: 37985782 - Disable UKI signing Orabug: 36571828 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list...

RLSA-2026:39573 Important: yggdrasil security update

yggdrasil is a system daemon that subscribes to topics on an MQTT broker and routes any data received on the topics to an appropriate child "worker" process, exchanging data with its worker processes through a D-Bus message broker. Security Fixes: net: golang: Go net package: Denial of Service vi...

go-toolset:rhel8 security, bug fix, and enhancement update

An update is available for delve, module.delve, module.golang, golang. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list Go Toolset provides the Go programming...

Security update for python-cryptography

This update for python-cryptography fixes the following issues: CVE-2026-41676: openssl: Deriver:derive and PkeyCtxRef:derive can overflow short buffers on OpenSSL 1.1.1 bsc1270208. CVE-2026-41677: openssl: out-of-bounds read in PEM password callback when returning an oversized length bsc1270620...

RockyLinux 10 : yggdrasil (RLSA-2026:39573)

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:39573 advisory. net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME CVE-2026-33811 golang.org/x/net/idna: golang:...

RHEL 10 : yggdrasil (RHSA-2026:39573)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:39573 advisory. yggdrasil is a system daemon that subscribes to topics on an MQTT broker and routes any data received on the topics to an appropriate chil...

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

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...

JLSEC-2026-685 In function MatchDomainName(), input param str is treated as a NULL terminated string despite...

In function MatchDomainName, input param str is treated as a NULL terminated string despite being user provided and unchecked. Specifically, the function X509checkhost takes in a pointer and length to check against, with no requirements that it be NULL terminated. If a caller was attempting to do...

JLSEC-2026-723 Heap buffer overflow in CertFromX509 via AuthorityKeyIdentifier size confusion. A heap buffer...

Heap buffer overflow in CertFromX509 via AuthorityKeyIdentifier size confusion. A heap buffer overflow occurs when converting an X.509 certificate internally due to incorrect size handling of the AuthorityKeyIdentifier extension...

JLSEC-2026-742 Partial-chain certificate verification may accept chains that terminate at a peer-supplied,...

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...

JLSEC-2026-735 Un-negotiated Raw Public Key (RFC 7250) accepted in place of an X.509 certificate, bypassing...

Un-negotiated Raw Public Key RFC 7250 accepted in place of an X.509 certificate, bypassing chain validation. A raw public key has no chain, so ParseCertRelative accepts it without performing any trust verification; it must therefore only be accepted when RPK was actually negotiated for that peer...

CVE-2026-45063

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, X509Authenticator extracts the user identifier from $SERVER'SSLCLIENTSDN' with an unanchored regex that matches emailAddress= anywhere in the distinguishe...

CVE-2026-45063 Symfony: Identity Spoofing via Unanchored DN Regex in X509Authenticator

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, X509Authenticator extracts the user identifier from $SERVER'SSLCLIENTSDN' with an unanchored regex that matches emailAddress= anywhere in the distinguishe...