CVE-2026-104424

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,...

CVE-2026-104424: Incorrect Calculation of Buffer Size

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,...

PT-2026-104235

Name of the Vulnerable Software and Affected Versions Zebra versions prior to 6.1.0 Description An incorrect calculation in the ZIP-317 block template selector fails to account for the header and transaction-count size within the block budget. This allows attackers to submit valid selectable...