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TI-2026-37937 Aliases CVE-2026-52829GHSA-63wg-wjjj-7cp8

ZEBRA: IPv4-Mapped Mempool Misbehavior Update Aborts Zebra Address Book

Priority MEDIUM 40CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-617.

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 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00609 49th percentileScored 2026-11-07
Fix Fixed zebra (ZcashFoundation): 4.5.0zebra-network (crates.io): 7.0.0+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZcashFoundationzebrabefore 4.5.04.5.0Patch availableCNA
—zebra-network (crates.io)before 7.0.07.0.0Patch availableGHSA-63wg-wjjj-7cp8
—zebrad (crates.io)before 4.5.04.5.0Patch availableGHSA-63wg-wjjj-7cp8
  • zebra VendorZcashFoundation Affected before 4.5.0 Fixed in 4.5.0 Patch available CNA
  • zebra-network (crates.io) Vendor— Affected before 7.0.0 Fixed in 7.0.0 Patch available GHSA-63wg-wjjj-7cp8
  • zebrad (crates.io) Vendor— Affected before 4.5.0 Fixed in 4.5.0 Patch available GHSA-63wg-wjjj-7cp8

Remediation

  • Fix · CNA zebra (ZcashFoundation) Fixed in 4.5.0
  • Fix · GHSA-63wg-wjjj-7cp8 zebra-network (crates.io) Fixed in 7.0.0 Advisory →
  • Fix · GHSA-63wg-wjjj-7cp8 zebrad (crates.io) Fixed in 4.5.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-52829
  2. 2026-10-03 Alias added: GHSA-63wg-wjjj-7cp8

References

Other 4

  • TI-2026-66079 Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missing-Output Handling CVSS 4.0HIGH 8.3
  • TI-2026-37850 ZEBRA: Mempool transaction admission denial via single-peer inbound queue saturation CVSS 3.1MEDIUM 5.3
  • TI-2026-71182 Improper block validation in Zebra gossip lets peers drop new blocks CVSS 4.0MEDIUM 6.3
  • TI-2026-29537 Zebra: addr/addrv2 Deserialization Resource Exhaustion CVSS 4.0MEDIUM 6.3
  • TI-2026-86702 Incomplete cleanup in Zebra lets peers stall initial sync CVSS 4.0HIGH 8.7
  • TI-2026-86701 Quadratic signature hashing in Zcash Zebra enables denial of service CVSS 4.0HIGH 8.7
See all 51 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences