CVE-2026-109363 | BDVDB-2026-386409 Detail

Description#

ZcashFoundation Zebra 6.4.0 before 6.4.2 parses version 6 transactions carrying a pre-NU6.3 consensus branch ID, but the size computation during UnminedTx construction treats re-serialization of the Orchard bundle as infallible, so the resulting error trips an expect that aborts zebrad. Unauthenticated peers can send a single pre-handshake tx message to crash the node, and can repeat this after each restart.

Impact#

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Exploit#

History#

1. Version 12026-10-12Record published in the CVE List.
2. Version 22026-10-13Most recent update recorded in the CVE List.