CVE-2026-104425

Description

ZcashFoundation Zebra before 6.1.0 contains a resource exhaustion vulnerability that allows unauthenticated peers to degrade block processing by pushing transactions with invalid Orchard proofs without being misbehavior-scored. Attackers can repeatedly push invalid proofs into the shared halo2 batch verifier, forcing honest block proofs onto the slow individual-verification path and slowing block processing roughly sevenfold.

CVSS Vector

References

• https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-g7c4-2w6c-cr3r
• https://www.vulncheck.com/advisories/zebra-before-6.1.0-batch-verification-poisoning-dos-via-unattributed-pushed-transactions