{"id":"CVE-2026-52829","title":"ZEBRA is a Zcash node written entirely in Rust","summary":"ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an unauthenticated IPv4 peer can deterministically terminate a synced Zebra node using the default Linux dual-stack listener configuration. The handshake path canonicalized …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-617","CWE-843"],"vendor":"zebra-network","product":"zebra-network","affected":["zebra-network <= 6.0.0","zebrad <= 4.4.1"],"patched":["zebra-network 7.0.0","zebrad 4.5.0"],"published":"2026-08-18","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:13:25.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-52829","references":[{"url":"https://github.com/ZcashFoundation/zebra/commit/1440b43ca7df59aca948090d45117557b217a6cd","label":"security-advisories@github.com"},{"url":"https://github.com/ZcashFoundation/zebra/releases/tag/v4.5.0","label":"security-advisories@github.com"},{"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-63wg-wjjj-7cp8","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-63wg-wjjj-7cp8"}],"tags":["nvd","ghsa","rust"],"epss":0.00432,"epssPercentile":0.36846,"ecosystem":"rust","ingestedAt":"2026-07-02T20:42:45.642Z","slug":"CVE-2026-52829","body":"## Overview\n\nZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an unauthenticated IPv4 peer can deterministically terminate a synced Zebra node using the default Linux dual-stack listener configuration. The handshake path canonicalized an IPv4-mapped IPv6 PeerSocketAddr such as ::ffff:127.0.0.1 to plain IPv4 before storing it through MetaAddr::new_connected, but the mempool misbehavior path forwarded the raw transient address to MetaAddrChange::UpdateMisbehavior. In zebra-network/src/meta_addr.rs, apply_to_meta_addr then compared the canonical address-book entry with the raw update address and reached its unexpected address mismatch assertion. After the misbehavior batch flush, panic equals abort terminated zebrad; the peer only needed to complete a P2P handshake and advertise an invalid mempool transaction. This issue is fixed in version 4.5.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-52829)\n\nAffected packages:\n\n- `zebra-network <= 6.0.0`\n- `zebrad <= 4.4.1`\n\nPatched in:\n\n- `zebra-network 7.0.0`\n- `zebrad 4.5.0`\n\nSource: https://github.com/advisories/GHSA-63wg-wjjj-7cp8","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}