{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-4893 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-4893 is a medium-severity vulnerability in dnsmasq, published on 11 May 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-2026-4893 and fix it if it is affected.\n\nWhat it is: CVE-2026-4893 is a medium-severity vulnerability in dnsmasq, published on 11 May 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-2026-4893 in the wild and no public exploit code.\n\nAffected product: dnsmasq. 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-2026-4893/ (Markdown: https://insights.sbomify.com/CVE-2026-4893/index.md)","id":"CVE-2026-4893","markdown":"https://insights.sbomify.com/CVE-2026-4893/index.md","name":"CVE-2026-4893","record":{"aliases":["ALPINE-CVE-2026-4893","AZL-86760","BELL-CVE-2026-4893","CLEANSTART-2026-QZ78916","DEBIAN-CVE-2026-4893","GHSA-4rrv-pmrh-2vc4","UBUNTU-CVE-2026-4893"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"DNS server","requires_auth":"none","summary":"Remote attackers can bypass source checks and disclose information via crafted DNS packets in dnsmasq.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"certcc","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[],"description":"An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-05-27","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-05-27T05:27:28Z","kind":"github_poc","ref":"https://github.com/lottiedeyan/CVE20264893poc","stars":0,"title":"Generate the poc for CVE-2026-4893: broken EDNS Client Subnet validation."}],"tier":"poc_unverified"},"has_fix":true,"headline":"CVE-2026-4893","id":"CVE-2026-4893","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"Authentication bypass in multiple products from Frappe Technologies","id":"CVE-2026-4894"},"packages":[],"prev":{"headline":"CVE-2026-4892","id":"CVE-2026-4892"},"products":["dnsmasq"],"published":"2026-05-11","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-20","vendors":["dnsmasq"]},"summary":"Remote attackers can bypass source checks and disclose information via crafted DNS packets in dnsmasq.","url":"https://insights.sbomify.com/CVE-2026-4893/"}