MEDIUM 6.3 NVD
CVE-2026-109365
Zebra before 6.4.0 contains an uncontrolled resource consumption vulnerability that allows unauthenticated peers to force full proof verification by serving for
Zebra before 6.4.0 contains an uncontrolled resource consumption vulnerability that allows unauthenticated peers to force full proof verification by serving forged block bodies with valid header hashes. Attackers can flip authorizing-only bytes such as a coinbase scriptSig, wasting Sapling, Orchard, and Ironwood proof verification without penalty and stalling sync for 67 seconds.
References
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-3c94-hf7p-g5mf
- https://www.vulncheck.com/advisories/zebra-before-6.4.0-denial-of-service-via-same-hash-fo
This medium severity vulnerability with a CVSS score of 6.3 was published on 2026-10-12 via NVD.
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