What is CVE-2026-48486?

CVE-2026-48486 is a high-severity vulnerability, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-09-03.

How severe is CVE-2026-48486?

High severity. CVSS v3 base score is 7.5 out of 10.

CVE-2026-48486

CVE-2026-48486

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.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L.

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

Frequently asked questions

What is CVE-2026-48486?: CVE-2026-48486 is a high-severity vulnerability, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-09-03.
How severe is CVE-2026-48486?: High severity. CVSS v3 base score is 7.5 out of 10.