What’s Vulnerable › Vulnerabilities

CVE-2026-48486: Signum Node: Integer overflow in SMART_FEES fee distribution allows arbitrary miner reward inflation

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-03 · updated 2026-09-09
• Weakness: CWE-190

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.

Affected products

• signum-network signum-node: before 3.9.9

References

• https://github.com/signum-network/signum-node/releases/tag/v3.9.9
• https://github.com/signum-network/signum-node/security/advisories/GHSA-4vjp-2m22-r2q9

Get alerted when CVE-2026-48486 or the next vulnerability affects your stack