Zebra before 6.1.0 Incorrect Block Size Calculation in getblocktemplate
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.
CVE-2026-104424
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-104424
zebra
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "ZcashFoundation",
"product": "zebra",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "6.1.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.0",
"versionType": "semver"
}
],
"packageURL": "pkg:cargo/zebrad",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-104424
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #9000 · Revision 1
- Added to Heist Feed
- Publisher date