Vulnerability · Published Oct 2, 2026 · Assigned by VulnCheck

CVE-2026-104425Zebra before 6.1.0 Batch-Verification Poisoning DoS via Unattributed Pushed Transactions

Medium 5.3

In plain English

A medium-severity security flaw in zebra from ZcashFoundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 76.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
ZcashFoundation	zebra	0 – before 6.1.0

Weakness: CWE-405 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

GitHub Security Advisory (GHSA-g7c4-2w6c-cr3r) vendor-advisory
VulnCheck Advisory: Zebra before 6.1.0 Batch-Verification Poisoning DoS via Unattributed Pushed Transactions third-party-advisory