Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
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
FAQ
What is CVE-2026-48486?
CVE-2026-48486 is a vulnerability with a CVSS score of 7.5 (HIGH). 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(...
How severe is CVE-2026-48486?
CVE-2026-48486 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48486?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.