{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-42004 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-42004 is a low-severity vulnerability in PowerDNS DNSdist, published on 25 Jun 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-2026-42004 and fix it if it is affected.\n\nWhat it is: CVE-2026-42004 is a low-severity vulnerability in PowerDNS DNSdist, published on 25 Jun 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-2026-42004 in the wild and no public exploit code.\n\nAffected product: PowerDNS DNSdist. 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-2026-42004/ (Markdown: https://insights.sbomify.com/CVE-2026-42004/index.md)","id":"CVE-2026-42004","markdown":"https://insights.sbomify.com/CVE-2026-42004/index.md","name":"CVE-2026-42004","record":{"aliases":["DEBIAN-CVE-2026-42004","GHSA-q4qq-c3qm-82jj","UBUNTU-CVE-2026-42004"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"DNS load balancer","requires_auth":"none","summary":"Attackers bypass DNSdist filtering rules by smuggling EDNS options via crafted records that are rewritten during ECS insertion, exposing backend systems to unfiltered data.","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-115","name":"Misinterpretation of Input"}],"description":"An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.","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":"EDNS options smuggling","id":"CVE-2026-42004","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":"Insufficient input validation of internal web server","id":"CVE-2026-42005"},"packages":[],"prev":{"headline":"Concurrency and locking defects in GSS-TSIG","id":"CVE-2026-42002"},"products":["DNSdist"],"published":"2026-06-25","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":"2026-06-25","vendors":["PowerDNS"]},"summary":"Attackers bypass DNSdist filtering rules by smuggling EDNS options via crafted records that are rewritten during ECS insertion, exposing backend systems to unfiltered data.","url":"https://insights.sbomify.com/CVE-2026-42004/"}