{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-2291 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-2291 is a high-severity memory corruption 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-2026-2291 and fix it if it is affected.\n\nWhat it is: CVE-2026-2291 is a high-severity memory corruption 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-2026-2291 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-2026-2291/ (Markdown: https://insights.sbomify.com/CVE-2026-2291/index.md)","id":"CVE-2026-2291","markdown":"https://insights.sbomify.com/CVE-2026-2291/index.md","name":"CVE-2026-2291","record":{"aliases":["ALPINE-CVE-2026-2291","AZL-86763","BELL-CVE-2026-2291","CLEANSTART-2026-DR22797","DEBIAN-CVE-2026-2291","GHSA-hjxh-hmm9-wcmc","SUSE-SU-2026:1826-1","SUSE-SU-2026:1827-1","SUSE-SU-2026:1828-1","SUSE-SU-2026:21633-1","UBUNTU-CVE-2026-2291"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"DNS server software","requires_auth":"none","summary":"Attackers can exploit a heap buffer overflow in dnsmasq to inject false DNS cache entries or cause a denial of service.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"certcc","cpe":[],"cvss":{"score":7.3,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[],"description":"dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-06-01","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-06-01T01:24:38Z","kind":"github_poc","ref":"https://github.com/JianrongXiao-Linksys/dnsmasq-cve-2026","stars":0,"title":"Automated defect verification tool for 6 dnsmasq CVEs (CVE-2026-2291, 4890, 4891, 4892, 4893, 5172)"}],"tier":"poc_unverified"},"has_fix":true,"headline":"CVE-2026-2291","id":"CVE-2026-2291","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":7,"next":{"headline":"Morkva UA Shipping \u003c= 1.7.9 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Weight, kg' Field","id":"CVE-2026-2292"},"packages":[],"prev":{"headline":"Server-side request forgery in Post Affiliate Pro","id":"CVE-2026-2290"},"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-20","vendors":["dnsmasq"]},"summary":"Attackers can exploit a heap buffer overflow in dnsmasq to inject false DNS cache entries or cause a denial of service.","url":"https://insights.sbomify.com/CVE-2026-2291/"}