{"answers":{"affected":"3 open source packages ship an affected version, including github.com/coredns/coredns. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-26017 in the wild and no public exploit code.","fix":"Upgrade github.com/coredns/coredns to 1.14.2 or later.","what":"CVE-2026-26017 is a high-severity vulnerability in coredns, published on 6 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-26017 and fix it if it is affected.\n\nWhat it is: CVE-2026-26017 is a high-severity vulnerability in coredns, published on 6 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-26017 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/coredns/coredns (Go): affected all versions; fixed in 1.14.2\n- github.com/coredns/coredns (Go): affected all versions; fixed in 1.14.2\n- github.com/coredns/coredns (Go): affected all versions; fixed in 1.14.2\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-2026-26017/ (Markdown: https://insights.sbomify.com/CVE-2026-26017/index.md)","id":"CVE-2026-26017","markdown":"https://insights.sbomify.com/CVE-2026-26017/index.md","name":"CVE-2026-26017","record":{"aliases":["AZL-79497","AZL-79526","CLEANSTART-2026-RE30293","CLEANSTART-2026-TH82276","ECHO-6ae4-bee1-928d","GHSA-c9v3-4pv7-87pr","GO-2026-4630","MINI-26c6-mh7m-x477","MINI-2q63-7qjf-3v4p","MINI-2vwm-2w97-qp79","MINI-3c33-qc5p-v2mf","MINI-5fr2-76pj-83jr","MINI-7hmv-fp4r-8533","MINI-83hr-936x-fvw6","MINI-8p5j-wj26-hjjf","MINI-cv9c-829h-qvm6","MINI-g8w5-6pp8-92g4","MINI-h949-xcp3-9fwh","MINI-hhp6-3ww5-w473","MINI-m5mx-xj2q-r734","MINI-mh9q-4ppv-f334","MINI-mjp2-mxh7-g7xc","MINI-mxwf-6h9v-xxpc","MINI-p93j-j8w5-8699","MINI-pvp9-hvq7-gqv8","MINI-w349-8q8x-c8hw","MINI-wgx9-g72g-57w7","OESA-2026-2939"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"DNS server","requires_auth":"low_privilege","summary":"Attackers can bypass DNS access controls in CoreDNS due to a plugin execution order flaw, allowing unauthorized access.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"coredns","vendor":"coredns.io"}],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition"}],"description":"CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a logical vulnerability in CoreDNS allows DNS access controls to be bypassed due to the default execution order of plugins. Security plugins such as acl are evaluated before the rewrite plugin, resulting in a Time-of-Check Time-of-Use (TOCTOU) flaw. This issue has been patched in version 1.14.2.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"CoreDNS ACL Bypass","id":"CVE-2026-26017","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"CoreDNS Loop Detection Denial of Service Vulnerability","id":"CVE-2026-26018"},"packages":[{"ecosystem":"Go","fixed":["1.14.2"],"introduced":["0"],"last_affected":[],"package":"github.com/coredns/coredns","purl":null,"source":"GHSA-c9v3-4pv7-87pr"},{"ecosystem":"Go","fixed":["1.14.2"],"introduced":["0"],"last_affected":[],"package":"github.com/coredns/coredns","purl":"pkg:golang/github.com/coredns/coredns","source":"GHSA-c9v3-4pv7-87pr"},{"ecosystem":"Go","fixed":["1.14.2"],"introduced":["0"],"last_affected":[],"package":"github.com/coredns/coredns","purl":"pkg:golang/github.com/coredns/coredns","source":"GO-2026-4630"}],"prev":{"headline":"Pterodactyl Panel Allows Cross-Node Server Configuration Disclosure via Remote API Missing Authorization","id":"CVE-2026-26016"},"products":["coredns"],"published":"2026-03-06","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":8.7,"headline":"CoreDNS TSIG authentication bypass on encrypted DNS transports","id":"CVE-2026-33190","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":7.5,"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["coredns"]},"summary":"Attackers can bypass DNS access controls in CoreDNS due to a plugin execution order flaw, allowing unauthorized access.","url":"https://insights.sbomify.com/CVE-2026-26017/"}