Security Advisory 0143

Security Advisory 0143 . CSAF PDF Date: June 23, 2026 Revision | Date | Changes ---|---|--- 1.0 | Jun 23, 2026 | Initial release 1.1 | Jul 24, 2026 | Clarification of certain details 1.2 | August 10, 2026 | Added CSAF JSON file for download Description All of the CVEs covered in this advisory app...

DEBIAN-CVE-2026-55599

phpseclib is a PHP secure communications library. From 0.1.1 until 1.0.30, 2.0.55, and 3.0.54, when an application validates an untrusted X.509 certificate with phpseclib, X509::validateSignature reads a URL out of that certificate's Authority Information Access AIA extension and connects to it...

Important: Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 (etcd) security update

An update for etcd is now available for Red Hat OpenStack Platform 17.1 Wallaby. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each...

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

A flaw was found in the crypto/x509 package within Go golang. When verifying a certificate chain, excluded DNS Domain Name System constraints are not correctly applied to wildcard DNS Subject Alternative Names SANs if the case of the SAN differs from the constraint. This oversight could allow an...

crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption

A flaw was found in the crypto/tls component. This vulnerability occurs during Transport Layer Security TLS session resumption when certificate authority CA settings are modified between the initial and resumed handshakes. An attacker could exploit this to bypass certificate validation, allowing ...

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...

CVE-2026-55599

phpseclib (versions 0.1.1 through 1.0.30, 2.0.55, and 3.0.54) vulnerability: X509::validateSignature() reads a URL from the certificate's Authority Information Access extension and connects to it, enabling an attacker supplying a cert to fully control the outbound connection (host, port, path). T...

CVE-2026-55599 phpseclib: X.509 certificate validation sends attacker-controlled outbound requests (server-side request forgery) via Authority Information Access

phpseclib is a PHP secure communications library. From 0.1.1 until 1.0.30, 2.0.55, and 3.0.54, when an application validates an untrusted X.509 certificate with phpseclib, X509::validateSignature reads a URL out of that certificate's Authority Information Access AIA extension and connects to it...

CVE-2026-55599

phpseclib is a PHP secure communications library. From 0.1.1 until 1.0.30, 2.0.55, and 3.0.54, when an application validates an untrusted X.509 certificate with phpseclib, X509::validateSignature reads a URL out of that certificate's Authority Information Access AIA extension and connects to it...

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...

Moderate: Red Hat Security Advisory: golang-github-openprinting-ipp-usb security update

An update for golang-github-openprinting-ipp-usb is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available fo...

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...

Moderate: Red Hat Security Advisory: osbuild-composer security update

An update for osbuild-composer is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

PT-2026-51381

Name of the Vulnerable Software and Affected Versions phpseclib versions 0.1.1 through 1.0.29 phpseclib versions 2.0.0 through 2.0.54 phpseclib versions 3.0.0 through 3.0.53 Description An insecure default in the library allows an unauthenticated attacker to perform Server-Side Request Forgery...

RHEL 10 : golang-github-openprinting-ipp-usb (RHSA-2026:27740)

The remote Redhat Enterprise Linux 10 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:27740 advisory. HTTP reverse proxy, backed by IPP-over-USB connection to device. It enables driverless support for USB devices capable of using IPP-over-USB...

AlmaLinux 9 : podman (ALSA-2026:26447)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:26447 advisory. crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation CVE-2026-32281 crypto/tls: golang: Go crypto/tls:...

Astra Linux – Vulnerability in Erlang

There is a vulnerability in the improper certificate validation process for Erlang OTP publickey pubkeyocsp module, which allows forged OCSP responses signed with an expired responder certificate to be accepted as valid. The OCSP response verification in pubkeyocsp:verifyresponse/5 and...

Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to multiple issues in Cryptography [CVE-2026-34073] [CVE-2026-39892]

Summary IBM Watson Speech Services Cartridge is vulnerable to Improper Certificate Validation and Improper Restriction of Operations within the Bounds of a Memory Buffer in Cryptography CVE-2026-34073 CVE-2026-39892. Cryptography is used in our speech runtimes. This vulnerabilitiy has been...

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...

undici vulnerable to TLS certificate validation bypass via dropped requestTls in SOCKS5 ProxyAgent

Impact undici's ProxyAgent silently drops the requestTls option when configured with a SOCKS5 proxy URI socks5:// or socks://. The target HTTPS connection through the SOCKS5 tunnel falls back to Node's default trust store, ignoring user-configured ca, cert, key, rejectUnauthorized, and servername...