Astra Linux – Vulnerability in vsftpd

ALPACA is an application layer protocol content confusion attack, exploiting TLS servers that implement different protocols but use compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker, who has access to the victim’s traffic at the TCP/IP layer, can redirect...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: nginx (UTSA-2026-091420)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-091420 advisory. ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as...

CVE-2026-69248 python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 45.0.0 through 48.0.0, if an intermediate constrained CA permits the DNS name foo.example.com, and the leaf certificate has a wildcard in its DNS SAN of .example.com,...

CVE-2026-67293

A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol RDP. The software's Transport Layer Security TLS hostname matcher incorrectly validates wildcard certificates, allowing it to accept certificates for multi-label subdomains that should not be covered. This...

CVE-2026-67293

FreeRDP before 3.29.0 affected versions = 3.28.0 contains an improper certificate hostname validation vulnerability. The TLS hostname matcher tlsmatchhostname in libfreerdp/crypto/tls.c treats a wildcard pattern such as .example.com as matching any hostname ending in .example.com, so it incorrect...

CVE-2026-67293

FreeRDP prior to 3.29.0 (affected versions ≤ 3.28.0) contains an improper certificate hostname validation vulnerability. The TLS hostname matcher (tls_match_hostname() in libfreerdp/crypto/tls.c) treats a wildcard pattern such as *.example.com as matching any hostname ending in .example.com, allo...

CVE-2026-67293 FreeRDP before 3.29.0 Improper Certificate Hostname Validation

FreeRDP before 3.29.0 affected versions = 3.28.0 contains an improper certificate hostname validation vulnerability. The TLS hostname matcher tlsmatchhostname in libfreerdp/crypto/tls.c treats a wildcard pattern such as .example.com as matching any hostname ending in .example.com, so it incorrect...

CVE-2026-67293

FreeRDP before 3.29.0 affected versions = 3.28.0 contains an improper certificate hostname validation vulnerability. The TLS hostname matcher tlsmatchhostname in libfreerdp/crypto/tls.c treats a wildcard pattern such as .example.com as matching any hostname ending in .example.com, so it incorrect...

EUVD-2026-51860

FreeRDP before 3.29.0 affected versions = 3.28.0 contains an improper certificate hostname validation vulnerability. The TLS hostname matcher tlsmatchhostname in libfreerdp/crypto/tls.c treats a wildcard pattern such as .example.com as matching any hostname ending in .example.com, so it incorrect...

K000161963: Golang vulnerability CVE-2025-61727

Security Advisory Description An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example . com does not prevent a leaf certificate from claiming the SAN .example.co...

EUVD-2026-39549

Certificates with wildcard DNS SANs e.g. .example.com bypassed CA name-constraint checks. A certificate with a wildcard DNS SAN that should be rejected by the issuing CA's permitted/excluded DNS name constraints could be accepted...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: golang (UTSA-2026-016811)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016811 advisory. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes...

GHSA-XGP8-3HG3-C2MH webpki: Name constraints were accepted for certificates asserting a wildcard name

Permitted subtree name constraints for DNS names were accepted for certificates asserting a wildcard name. This was incorrect because, given a name constraint of accept.example.com, .example.com could feasibly allow a name of reject.example.com which is outside the constraint. This is very simila...

webpki: Name constraints were accepted for certificates asserting a wildcard name

Permitted subtree name constraints for DNS names were accepted for certificates asserting a wildcard name. This was incorrect because, given a name constraint of accept.example.com, .example.com could feasibly allow a name of reject.example.com which is outside the constraint. This is very simila...

Name constraints were accepted for certificates asserting a wildcard name

Permitted subtree name constraints for DNS names were accepted for certificates asserting a wildcard name. This was incorrect because, given a name constraint of accept.example.com, .example.com could feasibly allow a name of reject.example.com which is outside the constraint. This is very simila...

RUSTSEC-2026-0099 Name constraints were accepted for certificates asserting a wildcard name

Permitted subtree name constraints for DNS names were accepted for certificates asserting a wildcard name. This was incorrect because, given a name constraint of accept.example.com, .example.com could feasibly allow a name of reject.example.com which is outside the constraint. This is very simila...

OPENSUSE-SU-2026:20506-1 Security update for python-cryptography

This update for python-cryptography fixes the following issues: - CVE-2026-34073: Fixed X.509 bypass of name constraints on wildcard SANs with matching peer names. bsc1260876 - CVE-2026-26007: missing validation can lead to security issues for signature verification ECDSA and shared key negotiati...

Google Go 安全漏洞

Google Go is a static, strongly typed, compiled, concurrent programming language with garbage collection features from the American company Google. There is a security vulnerability in Google Go, which stems from the incorrect application of DNS constraints during certificate chain verification...

DEBIAN-CVE-2026-34073

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography...

PYSEC-2026-35

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography...