{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-26437 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2023-26437 is a low-severity denial of service vulnerability in Powerdns Recursor, published on 4 Apr 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2023-26437 and fix it if it is affected.\n\nWhat it is: CVE-2023-26437 is a low-severity denial of service vulnerability in Powerdns Recursor, published on 4 Apr 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2023-26437 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-2023-26437/ (Markdown: https://insights.sbomify.com/CVE-2023-26437/index.md)","id":"CVE-2023-26437","markdown":"https://insights.sbomify.com/CVE-2023-26437/index.md","name":"CVE-2023-26437","record":{"aliases":["DEBIAN-CVE-2023-26437","GHSA-4wg5-gmxh-4r2r","UBUNTU-CVE-2023-26437","openSUSE-SU-2023:0101-1","openSUSE-SU-2024:12838-1"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"PowerDNS Recursor","requires_auth":"none","summary":"Attackers can cause denial of service by marking authoritative servers unavailable in PowerDNS Recursor.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"OX","cpe":[{"product":"recursor","vendor":"powerdns"}],"cvss":{"score":3.4,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.","ecosystems":["SUSE:Package Hub 15 SP4","openSUSE:Leap 15.4","openSUSE:Tumbleweed"],"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":"Deterred spoofing attempts can lead to authoritative servers being marked unavailable","id":"CVE-2023-26437","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"powerdns:recursor","products":["powerdns:recursor"],"type":"denial_of_service","year":"2023"},"n_packages":3,"n_references":3,"next":{"headline":"Server-side request forgery in OX App Suite","id":"CVE-2023-26438"},"packages":[{"ecosystem":"SUSE:Package Hub 15 SP4","fixed":["4.6.6-bp154.2.6.1"],"introduced":["0"],"last_affected":[],"package":"pdns-recursor","purl":"pkg:rpm/suse/pdns-recursor\u0026distro=SUSE%20Package%20Hub%2015%20SP4","source":"openSUSE-SU-2023:0101-1"},{"ecosystem":"openSUSE:Leap 15.4","fixed":["4.6.6-bp154.2.6.1"],"introduced":["0"],"last_affected":[],"package":"pdns-recursor","purl":"pkg:rpm/opensuse/pdns-recursor\u0026distro=openSUSE%20Leap%2015.4","source":"openSUSE-SU-2023:0101-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["4.8.4-1.1"],"introduced":["0"],"last_affected":[],"package":"pdns-recursor","purl":"pkg:rpm/opensuse/pdns-recursor\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2024:12838-1"}],"prev":{"headline":"Deserialization in OX App Suite","id":"CVE-2023-26436"},"products":["Recursor"],"published":"2023-04-04","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":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"2025-02-13","vendors":["PowerDNS"]},"summary":"Attackers can cause denial of service by marking authoritative servers unavailable in PowerDNS Recursor.","url":"https://insights.sbomify.com/CVE-2023-26437/"}