CVE-2026-109365— Zebra before 6.4.0 Denial of Service via Same-Hash Forged Block Bodies
Quick assessment
Affected
ZcashFoundation zebra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Zebra 6.4.0 版本之前存在一处不受控的资源消耗漏洞，该漏洞允许未认证的对等节点通过提供带有有效头部哈希值的伪造区块主体，迫使系统进行完整的证明验证。攻击者可以翻转仅用于授权的字节（例如 coinbase scriptSig），从而在不受惩罚的情况下耗尽 Sapling、Orchard 和 Ironwood 的证明验证资源，并使区块链同步过程停滞长达 67 秒。
Possible ATT&CK Techniques 1 AI
T1496 · Resource HijackingAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ZcashFoundation | zebra | < 6.4.0 |
affected |
6.4.0 |
unaffected |
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I. Basic Information for CVE-2026-109365
Vulnerability Information
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Vulnerability Title
Zebra before 6.4.0 Denial of Service via Same-Hash Forged Block Bodies
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ZcashFoundation | zebra | 0 ~ 6.4.0 | - |
|
II. Public POCs for CVE-2026-109365
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-109365 (2)
Same Patch Batch · ZcashFoundation · 2026-10-12 · 4 CVEs total
| CVE-2026-109363 | 7.5 HIGH | Zebra 6.4.0 before 6.4.2 Denial of Service via Malformed v6 Transaction |
| CVE-2026-109364 | 5.3 MEDIUM | Zebra 2.3.0 before 6.4.0 Peer Ban Bypass via Exact-IP Keying |
| CVE-2026-109366 | 3.7 LOW | Zebra before 6.4.0 Gossiped Block Drop via Forged Coinbase scriptSig Height |
IV. Related Vulnerabilities
Same product: zebra
-
CVE-2026-109366
Zebra before 6.4.0 Gossiped Block Drop via Forged Coinbase s -
CVE-2026-109363
Zebra 6.4.0 before 6.4.2 Denial of Service via Malformed v6 -
CVE-2026-109364
Zebra 2.3.0 before 6.4.0 Peer Ban Bypass via Exact-IP Keying -
CVE-2026-104437
Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missin -
CVE-2026-104436
Zebra before 4.5.0 CPU Amplification via Uncapped getblocks/
Same vendor: ZcashFoundation
-
CVE-2026-109366
Zebra before 6.4.0 Gossiped Block Drop via Forged Coinbase s -
CVE-2026-109364
Zebra 2.3.0 before 6.4.0 Peer Ban Bypass via Exact-IP Keying -
CVE-2026-109363
Zebra 6.4.0 before 6.4.2 Denial of Service via Malformed v6 -
CVE-2026-104437
Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missin -
CVE-2026-104436
Zebra before 4.5.0 CPU Amplification via Uncapped getblocks/
Same weakness: CWE-345
-
CVE-2026-102682
Pipecat: Public exposure of Pipecat’s development runner can -
CVE-2026-102695
OmniFaces: Forged combined-resource IDs and related output/p -
CVE-2026-110607
BizSpring Shop through commit cf22d39daaf1 Payment Bypass vi -
CVE-2026-102250
TP-Link固件版本数据真实性校验绕过致设备控制权丢失 -
CVE-2026-109359
Contrast 1.8.0 before 1.24.1 Mesh CA Key Cross-Manifest Expo
V. Comments for CVE-2026-109365
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