CVE-2026-48486 — Signum Node: Integer overflow in SMART_FEES fee distribution allows arbitrary miner reward inflation
Signum Node is a HDD-mined cryptocurrency using an energy efficient and fair Proof-of-Commitment (PoC+) consensus algorithm. Prior to version 3.9.9, an integer overflow in Block…
Published: 2026-09-03 · CVSS: 7.5 · CVSS 3.1
Signum Node is a HDD-mined cryptocurrency using an energy efficient and fair Proof-of-Commitment (PoC+) consensus algorithm. Prior to version 3.9.9, an integer overflow in BlockServiceImpl.applyBlock() allowed a miner to receive an arbitrarily inflated block reward by crafting a block with a negative totalFeeCashBackNqt value. The vulnerability was introduced when the SMART_FEES hardfork (block ~1,029,000) enabled fee cash-back and burn accounting without overflow protection. This issue has been patched in version 3.9.9.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7