CVE-2026-48486

7.5 highEPSS 0.3%

High (7.5). EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 26% of CVEs (scores of 2026-10-31)
CWE: CWE-190
Published: 2026-09-03
Modified: 2026-09-09
Record from: the NVD, synced 2026-10-19

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

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