CVE-2026-35579

A flaw was found in CoreDNS. An unauthenticated network attacker can exploit incorrect handling of TSIG Transaction Signature authentication in the gRPC, QUIC, DoH DNS over HTTPS, and DoH3 transport implementations. This vulnerability allows an attacker to bypass TSIG protection, leading to...

CVE-2026-35579

CoreDNS is a DNS server written in Go. In versions prior to 1.14.3, the gRPC, QUIC, DoH, and DoH3 transport implementations incorrectly handle TSIG authentication. For gRPC and QUIC, the server checks whether the TSIG key name exists in the configuration but never calls dns.TsigVerify to validate...

EUVD-2026-27493

CoreDNS is a DNS server written in Go. In versions prior to 1.14.3, the gRPC, QUIC, DoH, and DoH3 transport implementations incorrectly handle TSIG authentication. For gRPC and QUIC, the server checks whether the TSIG key name exists in the configuration but never calls dns.TsigVerify to validate...

EUVD-2026-27444

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...

CVE-2026-33190

CoreDNS TSIG authentication bypass vulnerability (CVE-2026-33190) affects versions prior to 1.14.3 on non-plain-DNS transports. The tsig plugin trusts the transport writer’s TsigStatus() instead of verifying TSIG itself, causing unauthenticated remote access over DoT, DoH, DoH3, DoQ, and gRPC. Do...

CoreDNS 安全漏洞

CoreDNS is a DNS server within the CoreDNS community. Versions of CoreDNS prior to 1.14.3 contained a security vulnerability. This vulnerability stemmed from the tsig plugin’s trust transfer writer, which relied on TsigStatus for verification instead of performing its own validation. This allowed...

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...

Missing Critical Step in Authentication

Overview github.com/coredns/coredns/core/dnsserver is a package that implements all the interfaces from Caddy, so that CoreDNS can be a servertype plugin. Affected versions of this package are vulnerable to Missing Critical Step in Authentication in the TSIG authentication process for gRPC, QUIC,...

EUVD-2026-26071

The deprecated functions nsprintrrf, nsprintrr and fpnquery in the GNU C Library version 2.2 and newer fail to validate the RDATA content against the RDATA length in a DNS response when processing LOC, CERT, TKEY or TSIG records, which may allow an attacker to craft a DNS response, causing a targ...

PT-2026-35932

Name of the Vulnerable Software and Affected Versions CoreDNS versions prior to 1.14.3 Description CoreDNS transport implementations for gRPC, QUIC, DoH, and DoH3 incorrectly handle TSIG Transaction Signature authentication, which is a mechanism used to authenticate DNS messages. In gRPC and QUIC...

PT-2026-35876

Name of the Vulnerable Software and Affected Versions CoreDNS affected versions not specified Description A TSIG authentication bypass exists in CoreDNS affecting modern transports. TSIG Transaction Signature is a mechanism used to authenticate DNS messages. Recommendations At the moment, there i...

SUSE CVE-2026-3119

Under certain conditions, named may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature TSIG from a key declared in the named configuration. This issue affects BIND 9 versions 9.20....

CVE-2026-3119

A flaw was found in BIND, specifically within the named daemon. An authenticated remote attacker, possessing a valid Transaction Signature TSIG key configured on the server, could send a specially crafted query containing a TKEY record. This action may cause the named daemon to crash, leading to ...

EUVD-2026-15411

Under certain conditions, named may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature TSIG from a key declared in the named configuration. This issue affects BIND 9 versions 9.20....

CVE-2026-3119

Under certain conditions, named may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature TSIG from a key declared in the named configuration. This issue affects BIND 9 versions 9.20....

ALPINE-CVE-2026-3119

Under certain conditions, named may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature TSIG from a key declared in the named configuration. This issue affects BIND 9 versions 9.20....

CVE-2026-3119

Under certain conditions, named may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature TSIG from a key declared in the named configuration. This issue affects BIND 9 versions 9.20....

CVE-2026-3119

Under certain conditions, named may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature TSIG from a key declared in the named configuration. This issue affects BIND 9 versions 9.20....

Linux Distros Unpatched Vulnerability : CVE-2026-3119

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Under certain conditions, named may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incomin...

PT-2026-27773

Name of the Vulnerable Software and Affected Versions BIND versions 9.20.0 through 9.20.20 BIND versions 9.21.0 through 9.21.19 BIND versions 9.20.9-S1 through 9.20.20-S1 Description BIND may terminate unexpectedly when processing a correctly signed query containing a TKEY record. This issue occu...