{"cve":"CVE-2026-82409","nvd":{"published":"2026-09-23T20:17:16.893","modified":"2026-09-24T16:17:12.420","status":"Deferred","description":"Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, indexer/common.go serializedDataForUpdateAccounts places the attacker-controlled acc.Name value into an Elasticsearch _bulk JSON and NDJSON request without escaping it. The SetAccountName transaction accepts valid UTF-8 account names containing quotes, backslashes, and newlines, and the resulting name is stored in consensus account state. When an indexer processes the account, those characters can break the JSON string, reject a bulk batch, or inject additional bulk actions that create, overwrite, or delete documents in indices writable by the indexer. The persistent state value is replayed by new or historical indexers, and direct access to the indexing host or Elasticsearch port is not required. This issue is fixed in version 1.7.20.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:L","score":8.4},"cvss_v3":null,"cwes":["CWE-116"],"references":["https://github.com/klever-io/klever-go/commit/f00366768b24be18fa7ae9de2e1905caa8b350af","https://github.com/klever-io/klever-go/commit/f54ea730cc80a3ba4f906586a7d221b281548190","https://github.com/klever-io/klever-go/releases/tag/v1.7.20","https://github.com/klever-io/klever-go/security/advisories/GHSA-7c7c-373r-gfjj","https://github.com/klever-io/klever-go/security/advisories/GHSA-7c7c-373r-gfjj"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:02.509636177+00:00"},"epss":{"cve":"CVE-2026-82409","score":0.0034,"percentile":0.27571,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-7c7c-373r-gfjj","url":"https://osv.dev/vulnerability/GHSA-7c7c-373r-gfjj","summary":"Klever-Go: Elasticsearch bulk / painless injection via on-chain account name -> explorer/indexer data forgery","modified":"2026-10-01T20:56:09.719962180Z","packages":[{"ecosystem":"Go","name":"github.com/klever-io/klever-go","purl":"pkg:golang/github.com/klever-io/klever-go","ranges":["<1.7.20"],"fixed":["1.7.20"]}]},{"id":"GO-2026-6585","url":"https://osv.dev/vulnerability/GO-2026-6585","summary":"Klever-Go: Elasticsearch bulk / painless injection via on-chain account name -> explorer/indexer data forgery in github.com/klever-io/klever-go","modified":"2026-10-01T20:45:15.080816828Z","packages":[{"ecosystem":"Go","name":"github.com/klever-io/klever-go","purl":"pkg:golang/github.com/klever-io/klever-go","ranges":["<1.7.20"],"fixed":["1.7.20"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}