What is GHSA-3xx8-299f-8q53?

GHSA-3xx8-299f-8q53 is a security advisory published by GitHub Security Advisories with Medium severity. Zebra before 6.1.0 contains an incorrect calculation vulnerability in its ZIP-317 block template...

Which CVE IDs does GHSA-3xx8-299f-8q53 cover?

GHSA-3xx8-299f-8q53 covers the following CVE IDs: CVE-2026-104424. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-3xx8-299f-8q53?

GHSA-3xx8-299f-8q53 has a CVSS v3 base score of 3.7, published by GitHub Security Advisories.

GHSA-3xx8-299f-8q53MediumCVSS 3.7

Zebra before 6.1.0 contains an incorrect calculation vulnerability in its ZIP-317 block template...

Vendor

GitHub Security Advisories

Published

October 2, 2026

Last Modified

October 2, 2026

🔗 CVE IDs covered (1)

CVE-2026-104424 →

📋 Description

Zebra before 6.1.0 contains an incorrect calculation vulnerability in its ZIP-317 block template selector that omits header and transaction-count size from the block budget. Attackers can place valid selectable transactions in a victim miner's mempool to shape templates into oversized blocks, causing rejection and wasted proof-of-work.

🔗 References (4)

https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-95m2-vx53-v2jw
https://nvd.nist.gov/vuln/detail/CVE-2026-104424
https://www.vulncheck.com/advisories/zebra-before-6.1.0-incorrect-block-size-calculation-in-getblocktemplate
https://github.com/advisories/GHSA-3xx8-299f-8q53