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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zfnd | Zebrad | < 4.4.0 |
Related Weaknesses (CWE)
References
- https://github.com/ZcashFoundation/zebra/releases/tag/v4.4.0Release Notes
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-jv4h-j224-23ccVendor Advisory
FAQ
What is CVE-2026-44498?
CVE-2026-44498 is a vulnerability with a CVSS score of 7.5 (HIGH). 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), all...
How severe is CVE-2026-44498?
CVE-2026-44498 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44498?
Check the references section above for vendor advisories and patch information. Affected products include: Zfnd Zebrad.