{"cve":"CVE-2026-34377","nvd":{"published":"2026-03-31T15:16:19.233","modified":"2026-07-24T21:10:00.143","status":"Analyzed","description":"ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-consensus version 5.0.1, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By matching a valid transaction's txid while providing invalid authorization data, a miner could cause vulnerable Zebra nodes to accept an invalid block, leading to a consensus split from the rest of the Zcash network. This would not allow invalid transactions to be accepted but could result in a consensus split between vulnerable Zebra nodes and invulnerable Zebra and Zcashd nodes. This issue has been patched in zebrad version 4.3.0 and zebra-consensus version 5.0.1.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H","score":8.4},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":8.1},"cwes":["CWE-347"],"references":["https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0","https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-3vmh-33xr-9cqh","https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements"],"products":["zfnd:zebra","zfnd:zebra-consensus"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-34377","score":0.0026,"percentile":0.1778,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-3vmh-33xr-9cqh","url":"https://osv.dev/vulnerability/GHSA-3vmh-33xr-9cqh","summary":"Zebra has a Consensus Failure due to Improper Verification of V5 Transactions","modified":"2026-03-31T19:04:49.014205Z","packages":[{"ecosystem":"crates.io","name":"zebrad","purl":"pkg:cargo/zebrad","ranges":["<4.3.0"],"fixed":["4.3.0"]},{"ecosystem":"crates.io","name":"zebra-consensus","purl":"pkg:cargo/zebra-consensus","ranges":["<5.0.1"],"fixed":["5.0.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}