{"affected":[{"defaultStatus":"unaffected","ecosystem":"cargo","packageName":"zebrad","product":"zebra","source":"CNA: VulnCheck","vendor":"ZcashFoundation","versions":[{"lessThan":"7.0.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"7.0.0","versionType":"semver"}]}],"cveId":"CVE-2026-123557","cwes":["CWE-617"],"description":"ZcashFoundation Zebra zebrad before 7.0.0 contains a reachable assertion race condition that allows unauthenticated remote peers to abort the node by triggering disconnection during a blocked outbound send. Malicious peers can return empty FindBlocks or FindHeaders replies and stop reading their socket, dropping an unresolved MustUseClientResponseSender and terminating syncing nodes.","epss":{"date":"2026-11-10","percentile":0.23853,"score":0.00308},"exploits":[],"kev":null,"metrics":[{"score":8.2,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":5.9,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},{"score":8.2,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:H/AT:P/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":5.9,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794333523746,"publishedAt":1794101878967,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-6v36-c42v-v98p"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/zebra-zebrad-before-7.0.0-reachable-assertion-dos-via-peer-disconnection"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-6v36-c42v-v98p"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/zebra-zebrad-before-7.0.0-reachable-assertion-dos-via-peer-disconnection"}],"remediation":[],"revision":"7384fdd844060b2b5367d4239b35a46c4bc3ca778578c21a698f36f3b685627c","sources":[{"modifiedAt":1794333523746,"name":"CNA: VulnCheck","retrievedAt":1794334213818,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123557"},{"modifiedAt":1794104207813,"name":"NVD","retrievedAt":1794118574186,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123557"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794334235200,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123557"}],"ssvc":{"assessedAt":1794325314130,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Zebra zebrad before 7.0.0 Reachable Assertion DoS via Peer Disconnection","updatedAt":1794334235200}