CVE-2026-33190 CoreDNS TSIG authentication bypass on encrypted DNS transports

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the tsig plugin can be bypassed on non-plain-DNS transports DoT, DoH, DoH3, DoQ, and gRPC because it trusts the transport writer's TsigStatus instead of performing verification itself. The DoH and DoH3 writer's TsigStatus...

Critical Photon OS Security Update - PHSA-2026-5.0-0841

Updates of 'telegraf', 'grpc' packages of Photon OS have been released...

Critical Photon OS Security Update - PHSA-2026-5.0-91-0841

Updates of 'grpc', 'telegraf' packages of Photon OS have been released...

Authorization Bypass

google.golang.org/grpc is vulnerable to authorization bypass. The vulnerability is due to improper validation of the HTTP/2 :path pseudo-header, which allows an attacker to send malformed requests without a leading slash and bypass path-based authorization policies when fallback "allow" rules are...

Amazon Linux 2 : rclone, --advisory ALAS2-2026-3264 (ALAS-2026-3264)

"The version of rclone installed on the remote host is prior to 1.55.1-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3264 advisory. gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper...

Important: rclone

Issue Overview: gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of the HTTP/2 :path pseudo-header. The gRPC-Go server was too lenient in its routing logic, accepting requests where the :path omitted...

Important: rclone

Issue Overview: crypto/tls: handshake messages may be processed at the incorrect encryption level CVE-2025-61730 On Unix platforms, when listing the contents of a directory using File.ReadDir or File.Readdir the returned FileInfo could reference a file outside of the Root in which the File was...

GHSA-VP29-5652-4FW9 CoreDNS has TSIG authentication bypass on gRPC and QUIC transports

Summary The gRPC, QUIC, DoH, and DoH3 transports in CoreDNS incorrectly handle TSIG authentication. For gRPC and QUIC, CoreDNS checks whether the TSIG key name exists in the config, but does not actually verify the TSIG HMAC. If the key name matches, tsigStatus remains nil and the tsig plugin...

CoreDNS has TSIG authentication bypass on gRPC and QUIC transports

Summary The gRPC, QUIC, DoH, and DoH3 transports in CoreDNS incorrectly handle TSIG authentication. For gRPC and QUIC, CoreDNS checks whether the TSIG key name exists in the config, but does not actually verify the TSIG HMAC. If the key name matches, tsigStatus remains nil and the tsig plugin...

CoreDNS has TSIG authentication bypass on DoT, DoH, DoH3, DoQ, and gRPC

Summary CoreDNS' tsig plugin can be bypassed on non-plain-DNS transports because it trusts the transport writer's TsigStatus instead of performing verification itself. In the attached PoC, plain DNS/TCP correctly rejects an invalid TSIG NOTAUTH, while the same invalid-TSIG request is accepted ove...

Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in google.golang.org/grpc-v1.62.0

Summary IBM Watson Discovery Cartridge affected by vulnerability in google.golang.org/grpc-v1.62.0 Vulnerability Details CVEID:CVE-2026-33186 DESCRIPTION: gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input...

Spring gRPC SecurityContext leaks across requests upon authorization failure

When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to the gRPC worker thread and can be inherited by a subsequent unauthenticated request on the same thread. This may allow the subsequent user to gain escalated permissions. Affected versions:...

CVE-2026-40969

The raw message of every server-side AuthenticationException is returned to the unauthenticated remote caller in the gRPC status description. This allows an attacker to obtain information about the authentication failure, which may be useful for further attacks. Affected versions: Spring gRPC:...

CVE-2026-40968 Spring gRPC SecurityContext leaks across requests on authorization failure

When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to the gRPC worker thread and can be inherited by a subsequent unauthenticated request on the same thread. This may allow the subsequent user to gain escalated permissions. Affected versions:...

CVE-2026-40968

CVE-2026-40968 affects Spring gRPC 1.0.0–1.0.2 (fixed in 1.0.3; older/unsupported versions also affected). The issue: when an authenticated user is denied access to a gRPC method, the user’s authenticated identity remains bound to a gRPC worker thread and can be inherited by a subsequent unauthen...

Generation of Error Message Containing Sensitive Information

Overview Affected versions of this package are vulnerable to Generation of Error Message Containing Sensitive Information due to the raw message of every server-side AuthenticationException being returned to the unauthenticated remote caller in the gRPC status description. This allows an attacker...

Vmware Spring gRPC 安全漏洞

Vmware Spring gRPC is an extension component for Spring application development developed by Vmware, a company in the United States. Versions 1.0.0 to 1.0.2 of Vmware Spring gRPC contain security vulnerabilities. These vulnerabilities arise when authenticated users are denied access to gRPC...

google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation

A flaw was found in gRPC-Go, the Go language implementation of gRPC. This vulnerability, an authorization bypass, is caused by improper input validation of the HTTP/2 :path pseudo-header. A remote attacker can exploit this by sending raw HTTP/2 frames with a malformed :path that omits the mandato...

google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation

A flaw was found in gRPC-Go, the Go language implementation of gRPC. This vulnerability, an authorization bypass, is caused by improper input validation of the HTTP/2 :path pseudo-header. A remote attacker can exploit this by sending raw HTTP/2 frames with a malformed :path that omits the mandato...

RHEL 9 : rhc (RHSA-2026:10705)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:10705 advisory. rhc is a client tool and daemon that connects the system to Red Hat hosted services enabling system and subscription management. Security Fixes:...