CVE-2026-4891

{"id": "CVE-2026-4891", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-4891", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-11T18:27:33.459839Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cret@cert.org", "affectedData": [{"vendor": "dnsmasq", "product": "dnsmasq", "versions": [{"status": "affected", "version": "0", "lessThan": "2.92rel2", "versionType": "custom"}]}]}], "published": "2026-05-11T18:16:41.380", "references": [{"url": "https://github.com/NixOS/nixpkgs/pull/519082", "source": "cret@cert.org"}, {"url": "https://github.com/NixOS/nixpkgs/pull/519093", "source": "cret@cert.org"}, {"url": "https://github.com/pi-hole/FTL/releases/tag/v6.6.2", "source": "cret@cert.org"}, {"url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html", "source": "cret@cert.org"}, {"url": "https://thekelleys.org.uk/dnsmasq/CVE/", "source": "cret@cert.org"}, {"url": "https://www.kb.cert.org/vuls/id/471747", "source": "cret@cert.org"}], "vulnStatus": "Awaiting Analysis", "descriptions": [{"lang": "en", "value": "A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet."}], "lastModified": "2026-06-17T10:57:24.237", "sourceIdentifier": "cret@cert.org"}