{"answers":{"affected":"1 open source package ship an affected version, including hickory-net.","exploited":"There is no known exploitation of CVE-2026-123584 in the wild and no public exploit code.","exposure":"","fix":"Upgrade hickory-net to 0.26.2 or later.","what":"CVE-2026-123584 is a high-severity vulnerability in hickory-dns, published on 8 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123584 and fix it if it is affected.\n\nWhat it is: CVE-2026-123584 is a high-severity vulnerability in hickory-dns, published on 8 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123584 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- hickory-net (crates.io): affected from 0.26.0; fixed in 0.26.2\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-2026-123584/ (Markdown: https://insights.sbomify.com/CVE-2026-123584/index.md)","id":"CVE-2026-123584","markdown":"https://insights.sbomify.com/CVE-2026-123584/index.md","name":"CVE-2026-123584","record":{"aliases":["DEBIAN-CVE-2026-123584","GHSA-v44v-c8m4-gc43","GHSA-v49p-x2x5-v8xm","RUSTSEC-2026-0517","UBUNTU-CVE-2026-123584"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-696","name":"Incorrect Behavior Order"}],"description":"The hickory-net crate in Hickory DNS 0.26.0 before 0.26.2 stops listening and returns an error when a client UDP connection receives a datagram that cannot be parsed as a DNS message. Remote attackers who guess the query's source port, without knowing the transaction ID, can spoof malformed responses to abort client queries, causing denial of service.","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 0.26.0 before 0.26.2 UDP Client Denial of Service via Spoofed Responses","id":"CVE-2026-123584","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":2,"next":{"headline":"Hickory DNS 0.25.0 before 0.26.2 Query Amplification via Irrelevant CNAME Records","id":"CVE-2026-123585"},"nickname":null,"packages":[{"ecosystem":"crates.io","fixed":["0.26.2"],"introduced":["0.26.0"],"last_affected":[],"package":"hickory-net","purl":"pkg:cargo/hickory-net","source":"RUSTSEC-2026-0517"}],"prev":{"headline":"Hickory DNS 0.25.0 through 0.25.2 Missing Bailiwick Filtering on Negative Responses","id":"CVE-2026-123583"},"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-11-12","vendors":["hickory-dns"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123584/"}