{"id":"CVE-2026-104425","title":"ZcashFoundation Zebra before 6.1.0 contains a resource exhaustion vulnerability that allows unauthenticated peers to degrade block processing by pushing transactions with invalid Orchard proofs without being misbehavior-scored","summary":"ZcashFoundation Zebra before 6.1.0 contains a resource exhaustion vulnerability that allows unauthenticated peers to degrade block processing by pushing transactions with invalid Orchard proofs without being misbehavior-scored. Attackers…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-405"],"vendor":"ZcashFoundation","product":"zebra","affected":["zebra < 6.1.0"],"published":"2026-10-02","updated":"2026-10-02","sourceUpdated":"2026-10-02T12:17:12.730","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104425","references":[{"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-g7c4-2w6c-cr3r","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/zebra-before-6.1.0-batch-verification-poisoning-dos-via-unattributed-pushed-transactions","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-02T12:17:44.331Z","slug":"CVE-2026-104425","body":"## Overview\n\nZcashFoundation Zebra before 6.1.0 contains a resource exhaustion vulnerability that allows unauthenticated peers to degrade block processing by pushing transactions with invalid Orchard proofs without being misbehavior-scored. Attackers can repeatedly push invalid proofs into the shared halo2 batch verifier, forcing honest block proofs onto the slow individual-verification path and slowing block processing roughly sevenfold.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}