Klever-Go: /log controls global node logging
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure, Security bypass
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200 and CWE-306.
Summary
Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the default-open GET /log WebSocket route configured in config/node/api.yaml and registered by network/api/api.go does not require authentication. The first client message is parsed as a logger Profile in network/api/logs/logSender.go and applied process-wide through Profile.Apply, allowing a remote client to change global log levels and formatting options until the connection closes. The same connection is registered as a log observer and can receive live process logs. An attacker can suppress normal logs, increase verbosity, distort operator visibility, and access operational information without credentials. This issue is fixed in version 1.7.20.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| klever-io | klever-go | before 1.7.20 | 1.7.20 | Patch available | CNA |
| — | github.com/klever-io/klever-go (Go) | before 1.7.20 | 1.7.20 | Patch available | GHSA-9v8p-frvj-2pcm |
- klever-go Vendorklever-io Affected before 1.7.20 Fixed in 1.7.20 Patch available CNA
- github.com/klever-io/klever-go (Go) Vendor— Affected before 1.7.20 Fixed in 1.7.20 Patch available GHSA-9v8p-frvj-2pcm
Remediation
- Fix · CNA klever-go (klever-io) Fixed in 1.7.20
- Fix · GHSA-9v8p-frvj-2pcm github.com/klever-io/klever-go (Go) Fixed in 1.7.20 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-86064
- 2026-10-03 Alias added: GHSA-9v8p-frvj-2pcm
References
Other 5
- https://github.com/klever-io/klever-go/security/advisories/GHSA-9v8p-frvj-2pcm
- https://github.com/klever-io/klever-go/pull/74
- https://github.com/klever-io/klever-go/commit/a2740c985a788fb69e17742ea4f0c37c440733b2
- https://github.com/klever-io/klever-go/releases/tag/v1.7.20
- https://github.com/klever-io/klever-go
More klever-io vulnerabilities
- TI-2026-40253 Klever-Go: SFT add-quantity `int64` overflow bypasses a finite per-nonce MaxSupply CVSS 4.0HIGH 8.7
- TI-2026-40252 Klever-Go: Percentage-transfer royalty skips the source debit at exactly-100% splits CVSS 4.0HIGH 8.7
- TI-2026-32588 Klever-Go MultiDataInterceptor: remote OOM via crafted compressed P2P payload CVSS 3.1HIGH 8.6
- TI-2026-39560 Integer underflow in klever-io klever-go CVSS 3.1CRITICAL 9.6
- TI-2026-58875 Resource allocation without limits in klever-io klever-go CVSS 3.1HIGH 7.5
- TI-2026-37979 Klever-Go: REST API slow-header connection exhaustion via Gin Engine.Run CVSS 3.1HIGH 7.5
Sources
- CVE-2026-86064 · CVE Program
- CVE-2026-86064 · NVD
- FIRST EPSS
- GHSA-9v8p-frvj-2pcm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences