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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-109365

Zebra before 6.4.0 Denial of Service via Same-Hash Forged Block Bodies

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ZcashFoundation zebra

Default version status: unaffected

  • 0 to < 6.4.0affected
  • 6.4.0unaffected
pkg:cargo/zebrad

References