{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-33261 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-33261 is a medium-severity vulnerability in Powerdns Recursor, published on 22 Apr 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-2026-33261 and fix it if it is affected.\n\nWhat it is: CVE-2026-33261 is a medium-severity vulnerability in Powerdns Recursor, published on 22 Apr 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-2026-33261 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-2026-33261/ (Markdown: https://insights.sbomify.com/CVE-2026-33261/index.md)","id":"CVE-2026-33261","markdown":"https://insights.sbomify.com/CVE-2026-33261/index.md","name":"CVE-2026-33261","record":{"aliases":["DEBIAN-CVE-2026-33261","GHSA-rq6v-8q98-rrj8","UBUNTU-CVE-2026-33261"],"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":"none","summary":"A null pointer dereference in PowerDNS Recursor during NSEC to NSEC3 zone transitions allows attackers to cause a denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"OX","cpe":[{"product":"recursor","vendor":"powerdns"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-353","name":"Missing Support for Integrity Check"}],"description":"A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.","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":"Null pointer accces in aggressive NSEC(3) cache","id":"CVE-2026-33261","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"powerdns:recursor","products":["powerdns:recursor"],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Insufficient validation of cookie reply","id":"CVE-2026-33262"},"packages":[],"prev":{"headline":"Insufficient input validation of internal webserver","id":"CVE-2026-33260"},"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":"A null pointer dereference in PowerDNS Recursor during NSEC to NSEC3 zone transitions allows attackers to cause a denial of service.","url":"https://insights.sbomify.com/CVE-2026-33261/"}