{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-33259 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-33259 is a medium-severity use after free vulnerability in Powerdns Recursor, published on 22 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-33259 and fix it if it is affected.\n\nWhat it is: CVE-2026-33259 is a medium-severity use after free vulnerability in Powerdns Recursor, published on 22 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-33259 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-2026-33259/ (Markdown: https://insights.sbomify.com/CVE-2026-33259/index.md)","id":"CVE-2026-33259","markdown":"https://insights.sbomify.com/CVE-2026-33259/index.md","name":"CVE-2026-33259","record":{"aliases":["DEBIAN-CVE-2026-33259","GHSA-6c6h-9v3q-3wqm","UBUNTU-CVE-2026-33259"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"PowerDNS Recursor","requires_auth":"high_privilege","summary":"Concurrent RPZ transfers can cause use-after-free and crashes in PowerDNS Recursor, leading to denial of service.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"OX","cpe":[{"product":"recursor","vendor":"powerdns"}],"cvss":{"score":5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.","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":"Concurrent modification of RPZ data can lead to denial of servce","id":"CVE-2026-33259","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"powerdns:recursor","products":["powerdns:recursor"],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Insufficient input validation of internal webserver","id":"CVE-2026-33260"},"packages":[],"prev":{"headline":"Crafted zones can cause increased resource usage","id":"CVE-2026-33258"},"products":["Recursor"],"published":"2026-04-22","related":[{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2009-4009","kev_date_added":null,"published":"2010-01-08"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2020-10030","kev_date_added":null,"published":"2020-05-19"},{"cvss_score":8.2,"headline":"Crafted delegations or IP fragments can poison cached delegations in Recursor","id":"CVE-2025-59023","kev_date_added":null,"published":"2026-02-09"},{"cvss_score":7.5,"headline":"Insufficient validation of incoming notifies over TCP can lead to a denial of service in Recursor","id":"CVE-2025-59030","kev_date_added":null,"published":"2025-12-09"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2023-22617","kev_date_added":null,"published":"2023-01-21"},{"cvss_score":7.5,"headline":"Memory corruption in pdns-recursor","id":"CVE-2018-16855","kev_date_added":null,"published":"2018-12-03"},{"cvss_score":7.5,"headline":"Other in n/a","id":"CVE-2009-4010","kev_date_added":null,"published":"2010-01-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-04-22","vendors":["PowerDNS"]},"summary":"Concurrent RPZ transfers can cause use-after-free and crashes in PowerDNS Recursor, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2026-33259/"}