CVE-2026-52829

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 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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/ZcashFoundation/zebra/commit/1440b43ca7df59aca948090d45117557b217a6cd
https://github.com/ZcashFoundation/zebra/releases/tag/v4.5.0
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-63wg-wjjj-7cp8

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-18 20:17

Updated : 2026-09-09 21:13

NVD link : CVE-2026-52829

Mitre link : CVE-2026-52829

CVE.ORG link : CVE-2026-52829

JSON object : View

Products Affected

No product.

CWE

CWE-617

Reachable Assertion

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')

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