{"affected":[{"defaultStatus":"unaffected","ecosystem":"cargo","packageName":"hickory-proto","product":"hickory-dns","source":"CNA: VulnCheck","vendor":"hickory-dns","versions":[{"lessThan":"0.26.2","status":"affected","version":"0.26.0","versionType":"semver"},{"status":"unaffected","version":"0.26.2","versionType":"semver"}]}],"cveId":"CVE-2026-123571","cwes":["CWE-191"],"description":"Hickory DNS from 0.26.0 before 0.26.2 contains an integer underflow vulnerability in TSIG RDATA decoding that allows remote attackers to trigger a panic via malformed records. Attackers can send a crafted TSIG record in DNS wire format to cause unchecked subtraction underflow, crashing builds with overflow checks enabled and causing denial of service.","epss":{"date":"2026-11-12","percentile":0.35714,"score":0.00409},"exploits":[],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},{"score":8.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":7.5,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794539067566,"publishedAt":1794101888593,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-x962-5xwx-fr8x"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/hickory-dns-from-0.26.0-before-0.26.2-panic-via-tsig-rdata-decoding"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-x962-5xwx-fr8x"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/hickory-dns-from-0.26.0-before-0.26.2-panic-via-tsig-rdata-decoding"}],"remediation":[],"revision":"3a539560c84858b867ea15cea0a4dcb4aafa296e28f9f124b46f4276b6493335","sources":[{"modifiedAt":1794539067566,"name":"CNA: VulnCheck","retrievedAt":1794542911117,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123571"},{"modifiedAt":1794348959797,"name":"NVD","retrievedAt":1794356341703,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123571"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794542929176,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123571"}],"ssvc":{"assessedAt":1794539058930,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Hickory DNS from 0.26.0 before 0.26.2 Panic via TSIG RDATA Decoding","updatedAt":1794542929176}