Is CVE-2026-48486 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-48486?

CVE-2026-48486 has a CVSS v3 severity of HIGH (7.5).

Back

CVE-2026-48486

Description

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.