{"answers":{"affected":"3 open source packages ship an affected version, including github.com/klever-io/klever-go.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82407 exists.","fix":"Upgrade github.com/klever-io/klever-go to 1.7.20 or later.","what":"CVE-2026-82407 is a high-severity denial of service vulnerability in klever-io klever-go, published on 23 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-82407 and fix it if it is affected.\n\nWhat it is: CVE-2026-82407 is a high-severity denial of service vulnerability in klever-io klever-go, published on 23 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82407 exists.\n\nAffected packages and fixed versions:\n- github.com/klever-io/klever-go (Go): affected all versions; fixed in 1.7.20\n- github.com/klever-io/klever-go (Go): affected all versions; fixed in 1.7.20\n- github.com/klever-io/klever-go (Go): affected all versions; fixed in 1.7.20\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-82407/ (Markdown: https://insights.sbomify.com/CVE-2026-82407/index.md)","id":"CVE-2026-82407","markdown":"https://insights.sbomify.com/CVE-2026-82407/index.md","name":"CVE-2026-82407","record":{"aliases":["GHSA-9wh6-9hq7-9688","GO-2026-6586"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Klever blockchain node","requires_auth":"low_privilege","summary":"Attackers can submit invalid BLS keys to halt consensus, causing network downtime in Klever-Go blockchain nodes.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","version":"4.0"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, core/kapp/validators/validators.go Register and the runtime validator update path accept a submitted BLSPublicKey without curve, prime-order subgroup, or nonzero validation. When a validator with a malformed key becomes eligible and is selected into a consensus group, MultiSigner.Reset and the corresponding signature verification creation path cannot deserialize the group key and cancel the slot. This causes repeated missed rounds and throughput degradation, and a network whose consensus group equals the eligible validator set can halt completely. Genesis validation is not affected because that path already performs CheckPublicKeyValid. This issue is fixed in version 1.7.20.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Klever-Go: Validator registration accepts an unvalidated BLS public key → consensus liveness DoS","id":"CVE-2026-82407","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"Klever-Go: Elasticsearch bulk / painless injection via on-chain account name -\u003e explorer/indexer data forgery","id":"CVE-2026-82409"},"packages":[{"ecosystem":"Go","fixed":["1.7.20"],"introduced":["0"],"last_affected":[],"package":"github.com/klever-io/klever-go","purl":null,"source":"GHSA-9wh6-9hq7-9688"},{"ecosystem":"Go","fixed":["1.7.20"],"introduced":["0"],"last_affected":[],"package":"github.com/klever-io/klever-go","purl":"pkg:golang/github.com/klever-io/klever-go","source":"GHSA-9wh6-9hq7-9688"},{"ecosystem":"Go","fixed":["1.7.20"],"introduced":["0"],"last_affected":[],"package":"github.com/klever-io/klever-go","purl":"pkg:golang/github.com/klever-io/klever-go","source":"GO-2026-6586"}],"prev":{"headline":"Klever-Go: Zombie-order theft: `Buy` missing `IsClaimed` guard in native marketplace","id":"CVE-2026-82406"},"products":["klever-go"],"published":"2026-09-23","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-23","vendors":["klever-io"]},"summary":"Attackers can submit invalid BLS keys to halt consensus, causing network downtime in Klever-Go blockchain nodes.","url":"https://insights.sbomify.com/CVE-2026-82407/"}