{"answers":{"affected":"3 open source packages ship an affected version, including github.com/coredns/coredns. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33190 exists.","fix":"Upgrade github.com/coredns/coredns to 1.14.3 or later.","what":"CVE-2026-33190 is a high-severity authentication bypass vulnerability in coredns, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-33190 and fix it if it is affected.\n\nWhat it is: CVE-2026-33190 is a high-severity authentication bypass vulnerability in coredns, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33190 exists.\n\nAffected packages and fixed versions:\n- github.com/coredns/coredns (Go): affected all versions; fixed in 1.14.3\n- github.com/coredns/coredns (Go): affected all versions; fixed in 1.14.3\n- github.com/coredns/coredns (Go): affected all versions; fixed in 1.14.3\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-33190/ (Markdown: https://insights.sbomify.com/CVE-2026-33190/index.md)","id":"CVE-2026-33190","markdown":"https://insights.sbomify.com/CVE-2026-33190/index.md","name":"CVE-2026-33190","record":{"aliases":["AZL-85718","CLEANSTART-2026-DL45562","CLEANSTART-2026-IX62843","ECHO-e8a3-06c3-1392","GHSA-qhmp-q7xh-99rh","GO-2026-5583","MINI-523p-mr57-3gm6","MINI-53rx-m6mw-pc48","MINI-683c-w5cx-jgm8","MINI-7gj4-4mgc-63w3","MINI-85jr-r69p-v69g","MINI-c56v-5w4w-4v83","MINI-cwqj-4c65-p376","MINI-ffx7-v6j3-h6q9","MINI-fwx6-8x5v-h2wg","MINI-g28v-c779-gmh7","MINI-g98w-h3qw-mf38","MINI-hj9v-4cjj-9gq9","MINI-hphx-rr3f-7cww","MINI-j37f-6vmp-536x","MINI-jw78-68jr-m896","MINI-p3v9-4v5p-h72q","MINI-pjgq-x6g4-j7v4","MINI-v2pg-j5rp-hw7v","MINI-vvxr-rrj2-346c","MINI-w4x8-36wx-5qh2"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"CoreDNS server","requires_auth":"none","summary":"Unauthenticated remote clients can bypass TSIG authentication on encrypted DNS transports, accessing restricted resources in CoreDNS deployments using this feature.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"coredns","vendor":"coredns.io"}],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-303","name":"Incorrect Implementation of Authentication Algorithm"}],"description":"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() always returns nil, the DoT server does not set TsigSecret on the dns.Server, and the DoQ and gRPC writers also unconditionally return nil. This allows an unauthenticated remote client to bypass TSIG-based authentication and access resources intended to be restricted behind a tsig require all policy. Plain DNS over TCP and UDP are not affected. This issue has been fixed in version 1.14.3.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"CoreDNS TSIG authentication bypass on encrypted DNS transports","id":"CVE-2026-33190","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"free5GC UDM vulnerable to null byte injection in URL path parameters causing 500 Internal Server Error","id":"CVE-2026-33191"},"packages":[{"ecosystem":"Go","fixed":["1.14.3"],"introduced":["0"],"last_affected":[],"package":"github.com/coredns/coredns","purl":null,"source":"GHSA-qhmp-q7xh-99rh"},{"ecosystem":"Go","fixed":["1.14.3"],"introduced":["0"],"last_affected":[],"package":"github.com/coredns/coredns","purl":"pkg:golang/github.com/coredns/coredns","source":"GHSA-qhmp-q7xh-99rh"},{"ecosystem":"Go","fixed":["1.14.3"],"introduced":["0"],"last_affected":[],"package":"github.com/coredns/coredns","purl":"pkg:golang/github.com/coredns/coredns","source":"GO-2026-5583"}],"prev":{"headline":"Further research determined the issue originates from a different product.","id":"CVE-2026-33189"},"products":["coredns"],"published":"2026-05-05","related":[{"cvss_score":8.7,"headline":"CoreDNS DNS-over-QUIC unbounded goroutine growth leads to denial of service","id":"CVE-2026-32934","kev_date_added":null,"published":"2026-05-05"},{"cvss_score":8.7,"headline":"CoreDNS DoH GET path missing size validation causes CPU and memory amplification","id":"CVE-2026-32936","kev_date_added":null,"published":"2026-05-05"},{"cvss_score":8.2,"headline":"CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison","id":"CVE-2026-33489","kev_date_added":null,"published":"2026-05-05"},{"cvss_score":8.2,"headline":"CoreDNS TSIG authentication bypass on gRPC, QUIC, DoH, and DoH3 transports","id":"CVE-2026-35579","kev_date_added":null,"published":"2026-05-05"},{"cvss_score":7.7,"headline":"CoreDNS ACL Bypass","id":"CVE-2026-26017","kev_date_added":null,"published":"2026-03-06"},{"cvss_score":7.5,"headline":"CoreDNS: proxyproto plugin panics on PPv2 datagram with non-UDP transport — single 28-byte packet remote DoS","id":"CVE-2026-62309","kev_date_added":null,"published":"2026-07-16"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-06","vendors":["coredns"]},"summary":"Unauthenticated remote clients can bypass TSIG authentication on encrypted DNS transports, accessing restricted resources in CoreDNS deployments using this feature.","url":"https://insights.sbomify.com/CVE-2026-33190/"}