{"answers":{"affected":"1 open source package ship an affected version, including hickory-proto.","exploited":"There is no known exploitation of CVE-2026-123571 in the wild and no public exploit code.","exposure":"","fix":"Upgrade hickory-proto to 0.26.2 or later.","what":"CVE-2026-123571 is a high-severity vulnerability in hickory-dns, published on 8 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-123571 and fix it if it is affected.\n\nWhat it is: CVE-2026-123571 is a high-severity vulnerability in hickory-dns, published on 8 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-123571 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- hickory-proto (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-2026-123571/ (Markdown: https://insights.sbomify.com/CVE-2026-123571/index.md)","id":"CVE-2026-123571","markdown":"https://insights.sbomify.com/CVE-2026-123571/index.md","name":"CVE-2026-123571","record":{"aliases":["DEBIAN-CVE-2026-123571","GHSA-p8hx-6263-88h9","GHSA-x962-5xwx-fr8x","RUSTSEC-2026-0488","UBUNTU-CVE-2026-123571"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)"}],"description":"Hickory DNS from 0.26.0 before 0.26.2 contains an integer underflow vulnerability in TSIG RDATA decoding that allows remote attackers to trigger a panic via malformed records. Attackers can send a crafted TSIG record in DNS wire format to cause unchecked subtraction underflow, crashing builds with overflow checks enabled and 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 from 0.26.0 before 0.26.2 Panic via TSIG RDATA Decoding","id":"CVE-2026-123571","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 0.20.1 before 0.26.2 Panic DoS via SVCB/HTTPS Zone Parser","id":"CVE-2026-123572"},"nickname":null,"packages":[{"ecosystem":"crates.io","fixed":["0.26.2"],"introduced":["0.26.0"],"last_affected":[],"package":"hickory-proto","purl":"pkg:cargo/hickory-proto","source":"RUSTSEC-2026-0488"}],"prev":{"headline":"Hickory DNS from 0.18 before 0.26.2 Memory Amplification DoS via RR Counts","id":"CVE-2026-123570"},"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-11-08","vendors":["hickory-dns"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-123571/"}