{"id":"CVE-2026-104424","published":"2026-10-02T12:17:12.580","lastModified":"2026-10-06T03:17:00.217","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.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-131"],"vendors":[],"products":[],"references":[{"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-95m2-vx53-v2jw","tags":[]},{"url":"https://www.vulncheck.com/advisories/zebra-before-6.1.0-incorrect-block-size-calculation-in-getblocktemplate","tags":[]}],"exploitRefs":[{"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-95m2-vx53-v2jw","tags":[]}],"hasPoc":true,"ai":null}