{"id":"CVE-2026-48486","summary":"Signum Node: Integer overflow in SMART_FEES fee distribution allows arbitrary miner reward inflation","details":"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.","aliases":["GHSA-4vjp-2m22-r2q9"],"modified":"2026-10-28T10:50:37.118904788Z","published":"2026-09-03T15:22:35.486Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48486.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-190"]},"references":[{"type":"WEB","url":"https://github.com/signum-network/signum-node/releases/tag/v3.9.9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48486.json"},{"type":"ADVISORY","url":"https://github.com/signum-network/signum-node/security/advisories/GHSA-4vjp-2m22-r2q9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48486"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/signum-network/signum-node","events":[{"introduced":"0"},{"fixed":"d2597c579e22b122b03a6c24291ce85a14aa2460"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"0"},{"fixed":"3.9.9"}]},{"source":"REFERENCES_TAG","original_tag":"v3.9.9","range":[{"fixed":"d2597c579e22b122b03a6c24291ce85a14aa2460"}]},{"range":[{"introduced":"0"},{"fixed":"3.9.9"}],"source":"DESCRIPTION"}]}}],"versions":["v3.9.8","v3.9.7","v3.9.4","v3.9.3","v3.9.2","v3.9.0-rc1","v3.9.0-rc","v3.8.4","v3.8.2","v3.8.1","v3.8.0","v3.8.0-dev","v3.7.2-beta1","v3.7.0-beta12","v3.7.0-beta11","v3.7.0-beta10","v3.7.0-beta9","v3.7.0-beta8","v3.7.0-beta7","v3.7.0-beta6","v3.7.0-beta5","v3.7.0-beta4","v3.7.0-beta3","v3.7.0-beta2","v3.7.0-beta1","v3.6.1-beta5","v3.6.1-beta4","v3.6.1-beta3","v3.6.1-beta2","v3.6.1-beta1","v3.5.2-beta3","v3.5.2-beta2","v3.5.2-beta1","v3.5.1-beta6","v3.4.3-beta3","v3.4.3-beta2","v3.4.3-beta1","v3.4.0-beta10","v3.4.0-beta9","v3.4.0-beta8","v3.4.0-beta5","v3.4.0-beta4","v3.4.0-beta3","v3.4.0-beta2","v3.4.0-beta1","v3.4.0-alpha2","v3.4.0-alpha1","v3.3.0","v3.3.0-alpha13","v3.2.0-beta3","v3.2.0-beta2","v3.2.0-beta1","v3.2.0-alpha3","v3.2.0-alpha2","v3.2.0-alpha1","v3.1.1","v3.1.0","v3.0.1","v3.0.0","v3.0.0-alpha8","v2.5.4","v2.5.3","v2.5.2","v2.5.1","v2.5.0","v2.5.0-alpha3","v2.5.0-alpha2","v2.5.0-alpha1","v2.4.2","v2.4.1","v2.4.0","v2.3.0","1.2.8","1.2.7","1.2.6","1.2.5","1.2.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48486.json","vanir_signatures":[{"target":{"file":"src/brs/Signum.java"},"deprecated":false,"digest":{"line_hashes":["71344313484646680913669198488519996053","299094564097870482772236802660430531409","336241233098094065944634198307005435622","255825274679377710856883545420679233164"],"threshold":0.9},"id":"CVE-2026-48486-9c4ee4b2","signature_type":"Line","signature_version":"v1","source":"https://github.com/signum-network/signum-node/commit/d2597c579e22b122b03a6c24291ce85a14aa2460"}],"vanir_signatures_modified":"2026-10-28T10:50:37Z"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L"}]}