{"id":"CVE-2026-48486","state":"PUBLISHED","title":"Signum Node: Integer overflow in SMART_FEES fee distribution allows arbitrary miner reward inflation","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.","publishedAt":"2026-09-03T15:22:35.486Z","updatedAt":"2026-09-03T18:00:18.434Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["signum-network signum-node"],"affected":[{"vendor":"signum-network","product":"signum-node","versions":[{"version":"< 3.9.9","status":"affected"}]}],"references":["https://github.com/signum-network/signum-node/security/advisories/GHSA-4vjp-2m22-r2q9","https://github.com/signum-network/signum-node/releases/tag/v3.9.9"],"weaknesses":["CWE-190"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/48xxx/CVE-2026-48486.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-48486","state":"PUBLISHED","datePublished":"2026-09-03T15:22:35.486Z","dateUpdated":"2026-09-03T18:00:18.434Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-21T15:33:08.291Z"},"containers":{"cna":{"title":"Signum Node: Integer overflow in SMART_FEES fee distribution allows arbitrary miner reward inflation","descriptions":[{"lang":"en","value":"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":[{"vendor":"signum-network","product":"signum-node","versions":[{"version":"< 3.9.9","status":"affected"}]}],"references":[{"url":"https://github.com/signum-network/signum-node/security/advisories/GHSA-4vjp-2m22-r2q9","name":"https://github.com/signum-network/signum-node/security/advisories/GHSA-4vjp-2m22-r2q9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/signum-network/signum-node/releases/tag/v3.9.9","name":"https://github.com/signum-network/signum-node/releases/tag/v3.9.9","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190: Integer Overflow or Wraparound","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-03T15:22:35.486Z"},"source":{"advisory":"GHSA-4vjp-2m22-r2q9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-03T18:00:11.614470Z","id":"CVE-2026-48486","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-03T18:00:18.434Z"}}]}}}