CVE-2026-109366 (GCVE-0-2026-109366)
Vulnerability from cvelistv5
Published
2026-10-12 16:05
Modified
2026-10-26 20:37
Severity ?
6.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-354 - Improper Validation of Integrity Check Value
Summary
Zebra before 6.4.0 contains an improper integrity validation vulnerability in the inbound gossip download path that allows unauthenticated peers to force dropping of new blocks without penalty. Attackers can serve a real block with a coinbase scriptSig rewritten to height 1, which keeps the ZIP-244 block hash, triggering a behind-tip drop before consensus validation and delaying tip discovery for mining backends.
References
Impacted products
Vendor Product Version
ZcashFoundation zebra Version: 0   ≤
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