{"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-2026-123558","cwes":["CWE-460"],"description":"Zebra zebrad before 7.0.0 contains a denial of service vulnerability that allows a malicious peer to stall checkpoint sync by cancelling the verifier rewind after a failed commit. Attackers can serve a forged block with altered authorizing data plus a restart-triggering block, leaving the verifier rejecting honest blocks until restart.","epss":{"date":"2026-11-09","percentile":0.28085,"score":0.00343},"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":1794232672250,"publishedAt":1794101879650,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-2w9f-9wx8-f5c8"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/zebra-before-7.0.0-checkpoint-sync-denial-of-service-via-cancelled-verifier-rewind"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-2w9f-9wx8-f5c8"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/zebra-before-7.0.0-checkpoint-sync-denial-of-service-via-cancelled-verifier-rewind"}],"remediation":[],"revision":"f13f59c6fbfc8c5dda6a96a009192d861e76faced85d84618bd196be957b613e","sources":[{"modifiedAt":1794232672250,"name":"CNA: VulnCheck","retrievedAt":1794233353799,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123558"},{"modifiedAt":1794104207997,"name":"NVD","retrievedAt":1794118574454,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123558"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794237012948,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123558"}],"ssvc":{"assessedAt":1794232664284,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Zebra before 7.0.0 Checkpoint Sync Denial of Service via Cancelled Verifier Rewind","updatedAt":1794237012948}