{"answers":{"affected":"2 open source packages ship an affected version, including hickory-net and hickory-proto.","exploited":"There is no known exploitation of CVE-2026-123581 in the wild and no public exploit code.","exposure":"","fix":"Upgrade hickory-net to 0.26.2 or later.","what":"CVE-2026-123581 is a medium-severity vulnerability in hickory-dns, published on 8 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123581 and fix it if it is affected.\n\nWhat it is: CVE-2026-123581 is a medium-severity vulnerability in hickory-dns, published on 8 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123581 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- hickory-net (crates.io): affected from 0.0.0-0; fixed in 0.26.2\n- hickory-proto (crates.io): affected from 0.0.0-0; fixed in 0.26.0-beta.1\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-2026-123581/ (Markdown: https://insights.sbomify.com/CVE-2026-123581/index.md)","id":"CVE-2026-123581","markdown":"https://insights.sbomify.com/CVE-2026-123581/index.md","name":"CVE-2026-123581","record":{"aliases":["AZL-113218","DEBIAN-CVE-2026-123581","GHSA-6w9h-68h2-v6xq","GHSA-929p-gjf6-5hqj","RUSTSEC-2026-0512","RUSTSEC-2026-0520","UBUNTU-CVE-2026-123581"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"}],"description":"Hickory DNS hickory-proto through 0.26.0-alpha.1 and hickory-net 0.26.0-beta.1 before 0.26.2 contain a DNSSEC validation flaw that accepts a response as a positive answer when any valid RRset appears in the answer section, without checking that the RRset is responsive to the query. Attackers can supply signed but unrelated RRsets so that responses lacking matching records are validated as positive answers instead of as no-data responses.","ecosystems":["crates.io"],"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":"Hickory DNS through 0.26.0-alpha.1 DNSSEC Validation Bypass via Unrelated RRset","id":"CVE-2026-123581","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Hickory DNS 0.25.0 before 0.26.2 DNSSEC Validation Bypass via SOA Record","id":"CVE-2026-123582"},"nickname":null,"packages":[{"ecosystem":"crates.io","fixed":["0.26.2"],"introduced":["0.0.0-0"],"last_affected":[],"package":"hickory-net","purl":"pkg:cargo/hickory-net","source":"RUSTSEC-2026-0520"},{"ecosystem":"crates.io","fixed":["0.26.0-beta.1"],"introduced":["0.0.0-0"],"last_affected":[],"package":"hickory-proto","purl":"pkg:cargo/hickory-proto","source":"RUSTSEC-2026-0512"}],"prev":{"headline":"Hickory-DNS 0.26.0-beta.1 before 0.26.2 DNSSEC Nonexistence Proof Forgery via NSEC3","id":"CVE-2026-123580"},"products":["hickory-dns"],"published":"2026-11-08","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-11-10","vendors":["hickory-dns"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123581/"}