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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.5
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS probability
- 0.43%
- CWE
- CWE-617, CWE-843
- Published
- 2026-08-18
- Last modified
- 2026-08-18
Affected products
- ZcashFoundation zebra
Weakness type
Related vulnerabilities
- CVE-2026-82068 — Persistent Fatal Assertion Crash in MongoDB Server via Crafted Retryable Write Commands Leads to Denial of Service
- CVE-2026-82065 — Insufficient Validation of Storage Configuration Options in MongoDB Server Leads to Persistent Denial of Service via Corrupted Metadata
- CVE-2026-82064 — Unauthenticated Denial of Service in MongoDB Server via Assertion Failure in Read Concern Processing on Replica Set Members
- CVE-2026-82059 — Improper Access Restriction of Internal Aggregation Expression in MongoDB Server Leads to Assertion Failure and Denial of Service
- CVE-2026-82052 — $regexFindAll may crash mongod server when byte-matching multi-byte UTF-8 chars
- CVE-2026-86317 — ggml-org llama.cpp RPC Server ggml-rpc.cpp deserialize_tensor assertion
- CVE-2026-20504 — In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote...
- CVE-2026-20503 — In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote...