CVE-2026-104425GHSA-g7c4-2w6c-cr3r
Zebra before 6.1.0 Batch-Verification Poisoning DoS via Unattributed Pushed Transactions
ZcashFoundation zebra
CVSS
6.9MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.30%Chance of exploitation activity in the next 30 days, higher than 22% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 6.1.0zebraCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
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.
Text from CVE List
Affected versions 2
- zebraaffected: all versions before 6.1.0CVE List
- zebraunaffected: 6.1.0CVE List