ngtcp2: ngtcp2: Denial of service via stack buffer overflow during QUIC handshake

A flaw was found in ngtcp2, a C implementation of the IETF QUIC Quick UDP Internet Connections protocol. A remote attacker can exploit a stack buffer overflow vulnerability by sending specially crafted, large transport parameters during the QUIC handshake. This occurs when the qlog callback is...

CLEANSTART-2026-BL76821 During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succ...

Multiple security vulnerabilities affect the rancher-agent package. During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed...

CVE-2026-45541 ESF-IDF: Remote Null Pointer Dereference in WebSocket Server

ESF-IDF is the Espressif Internet of Things IOT Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a NULL-pointer dereference exists in the WebSocket subprotocol-negotiation path of the esphttpserver component. While parsing the client-supplied Sec-WebSocket-Protocol request...

CVE-2026-45541 ESF-IDF: Remote Null Pointer Dereference in WebSocket Server

ESF-IDF is the Espressif Internet of Things IOT Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a NULL-pointer dereference exists in the WebSocket subprotocol-negotiation path of the esphttpserver component. While parsing the client-supplied Sec-WebSocket-Protocol request...

CVE-2026-45541

The CVE describes a NULL-pointer dereference in the WebSocket subprotocol-negotiation path of the esp_http_server component in ESF-IDF. During the WebSocket handshake, parsing the clientS WebSocket Protocol header may dereference a NULL tokenisation result, causing a crash before any application...

EUVD-2026-35914

ESF-IDF is the Espressif Internet of Things IOT Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a NULL-pointer dereference exists in the WebSocket subprotocol-negotiation path of the esphttpserver component. While parsing the client-supplied Sec-WebSocket-Protocol request...

CVE-2026-45541 ESF-IDF: Remote Null Pointer Dereference in WebSocket Server

ESF-IDF is the Espressif Internet of Things IOT Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a NULL-pointer dereference exists in the WebSocket subprotocol-negotiation path of the esphttpserver component. While parsing the client-supplied Sec-WebSocket-Protocol request...

RHEL 9 : samba (RHSA-2026:25049)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:25049 advisory. Samba is an open-source implementation of the Server Message Block SMB protocol and the related Common Internet File System CIFS protocol,...

PhoenixStorybook has cross-session PubSub topic injection via URL parameter

Summary The storybook iframe LiveView accepts a PubSub topic from the URL query string and broadcasts its own pid onto that topic with no check that the topic belongs to the current session. Any unauthenticated visitor who knows or guesses another user's playground topic can hijack the...

crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages

A flaw was found in the crypto/tls package within the Go golang standard library, specifically affecting TLS 1.3 connections. A remote attacker can exploit this vulnerability by sending multiple key update messages in a single record after the handshake. This can cause the connection to deadlock,...

PT-2026-50142

It was discovered that rabbitmq-c exposed credentials in command-line arguments under certain circumstances. A local attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. CVE-2023-35789 It was discovered that...

Netty: SNI handler pre-allocates up to 16 MiB from nine attacker bytes

SslClientHelloHandler.decode reads the 24-bit TLS handshake length and, when the ClientHello does not fit in the first record, eagerly allocates ctx.alloc.bufferhandshakeLength line 161. The guard at line 140 is handshakeLength maxClientHelloLength && maxClientHelloLength != 0, and the...

Allocation of Resources Without Limits or Throttling

Overview io.netty:netty-handler is a library that provides an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which...

Improper Verification of Source of a Communication Channel

Overview Affected versions of this package are vulnerable to Improper Verification of Source of a Communication Channel due to improper validation in the validateToken function. An attacker can cause the server to treat unvalidated client addresses as validated by supplying any non-empty token...

crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages

A flaw was found in the crypto/tls package within the Go golang standard library, specifically affecting TLS 1.3 connections. A remote attacker can exploit this vulnerability by sending multiple key update messages in a single record after the handshake. This can cause the connection to deadlock,...

PT-2026-47566

NoQuicTokenHandler is the tokenHandler used when the application does not set one. Its writeToken returns false server will not send Retry — acceptable, but validateToken unconditionally return 0. In QuicheQuicServerCodec.handlePacket, a non-negative return from validateToken is interpreted as...

TencentOS Server 4: gnutls (TSSA-2026:0305)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0305 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:...

PT-2026-47607

Name of the Vulnerable Software and Affected Versions Netty ionetty:netty-handler affected versions not specified Description An uncontrolled memory allocation issue exists in the SslClientHelloHandler.decode function. When a ClientHello does not fit in the first record, the system eagerly...

RHEL 10 : samba (RHSA-2026:22963)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:22963 advisory. Samba is an open-source implementation of the Server Message Block SMB protocol and the related Common Internet File System CIFS protocol,...

RHEL 9 : qemu-kvm (RHSA-2026:22147)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:22147 advisory. Kernel-based Virtual Machine KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the...