{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-52686 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-52686 is a low-severity vulnerability in PowerDNS Recursor, published on 23 Jul 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-2026-52686 and fix it if it is affected.\n\nWhat it is: CVE-2026-52686 is a low-severity vulnerability in PowerDNS Recursor, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-52686 in the wild and no public exploit code.\n\nAffected product: PowerDNS Recursor. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-52686/ (Markdown: https://insights.sbomify.com/CVE-2026-52686/index.md)","id":"CVE-2026-52686","markdown":"https://insights.sbomify.com/CVE-2026-52686/index.md","name":"CVE-2026-52686","record":{"aliases":["DEBIAN-CVE-2026-52686","GHSA-h7w8-vg64-36f2","UBUNTU-CVE-2026-52686"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"DNS recursor","requires_auth":"none","summary":"Attackers can bypass DNSSEC validation for wildcard CNAME/DNAME records, allowing spoofed DNS responses to be accepted as valid.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"OX","cpe":[],"cvss":{"score":3.7,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"The issue is a DNSSEC validation bypass where wildcard expansion proofs (NSEC/NSEC3 records) are accepted without signature validation when the wildcard answer is a CNAME or DNAME record.","ecosystems":[],"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":"Wildcard CNAME proof validation bypass","id":"CVE-2026-52686","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in OX Dovecot CE","id":"CVE-2026-52687"},"packages":[],"prev":{"headline":"Prefetch Feature Allows Persistent Ghost Domain Cache Poisoning Attack","id":"CVE-2026-52684"},"products":["Recursor"],"published":"2026-07-23","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-07-23","vendors":["PowerDNS"]},"summary":"Attackers can bypass DNSSEC validation for wildcard CNAME/DNAME records, allowing spoofed DNS responses to be accepted as valid.","url":"https://insights.sbomify.com/CVE-2026-52686/"}