CVE-2026-44498— ZEBRA: Block Validator Undercounts Coinbase and P2SH Sigops
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I. Basic Information for CVE-2026-44498
Vulnerability Information
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Vulnerability Title
ZEBRA: Block Validator Undercounts Coinbase and P2SH Sigops
Source: NVD (National Vulnerability Database)
Vulnerability Description
ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit (MAX_BLOCK_SIGOPS), allowing it to accept blocks that zcashd rejects with bad-blk-sigops. A miner who produces such a block can split the network: Zebra nodes follow the offending chain while zcashd nodes do not. This issue has been patched in version 4.4.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
数值计算不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
zebra 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zebra是Zcash Foundation开源的一个用Rust编写的Zcash全节点实现。 zebra 4.4.0之前版本存在安全漏洞，该漏洞源于区块验证器低估透明签名操作次数，可能导致网络分裂。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ZcashFoundation | zebra | < 4.4.0 | - |
II. Public POCs for CVE-2026-44498
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|---|
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- Release Zebra 4.4.0 · ZcashFoundation/zebra · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-44498
Same Patch Batch · ZcashFoundation · 2026-05-08 · 7 CVEs total
| CVE-2026-44500 | 5.3 MEDIUM | ZEBRA: Allocation Amplification in Inbound Network Deserializers |
| CVE-2026-41585 | ZEBRA: Denial of Service via Interrupted JSON-RPC Requests from Authenticated Clients | |
| CVE-2026-41583 | ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type Handling | |
| CVE-2026-41584 | ZEBRA: rk Identity Point Panic in Transaction Verification | |
| CVE-2026-44497 | ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type Handling due to Stale Buffer | |
| CVE-2026-44499 | ZEBRA: Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning |
IV. Related Vulnerabilities
Same product: zebra
- CVE-2026-44499
ZEBRA: Permanent Block Discovery Halt via Gossip Queue Satur - CVE-2026-44500
ZEBRA: Allocation Amplification in Inbound Network Deseriali - CVE-2026-44497
ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type - CVE-2026-41585
ZEBRA: Denial of Service via Interrupted JSON-RPC Requests f - CVE-2026-41584
ZEBRA: rk Identity Point Panic in Transaction Verification
Same vendor: ZcashFoundation
- CVE-2026-44499
ZEBRA: Permanent Block Discovery Halt via Gossip Queue Satur - CVE-2026-44500
ZEBRA: Allocation Amplification in Inbound Network Deseriali - CVE-2026-44497
ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type - CVE-2026-41585
ZEBRA: Denial of Service via Interrupted JSON-RPC Requests f - CVE-2026-41584
ZEBRA: rk Identity Point Panic in Transaction Verification
Same weakness: CWE-682
- CVE-2026-1229
Incorrect calculation in CIRCL secp384r1 CombinedMult - CVE-2026-24783
soroban-fixed-point-math has Incorrect Rounding and Overflow - CVE-2026-21911
Junos OS Evolved: Flapping management interface causes MAC l - CVE-2025-59047
matrix-sdk-base has panic in the `RoomMember::normalized_pow - CVE-2025-54427
Polkadot Frontier contains missing `check_inherent` for `not
V. Comments for CVE-2026-44498
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