Description
Klever-Go is the Go implementation of the Klever blockchain protocol. Versions from 1.7.14 through 1.7.17 are vulnerable to a remotely triggerable denial of service. Both REST APIs are started with the Gin Engine.Run convenience method, which serves requests through Go's default HTTP server with no ReadHeaderTimeout, ReadTimeout, or MaxHeaderBytes configured. As a result, incoming connections that never complete their request headers are held open indefinitely. When a REST listener is reachable beyond localhost through the documented all-interface bind or a Docker port-publish deployment, a single unauthenticated client can open many slow-header connections and hold them open until server file descriptors are exhausted, preventing the API from accepting new connections. This renders the REST API unavailable to legitimate clients. This issue is fixed in version 1.7.18.
Published: 2026-08-07
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-w4c6-7r69-w7j9 klever-go: REST API slow-header connection exhaustion via Gin Engine.Run
History

Tue, 11 Aug 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 08 Aug 2026 00:45:00 +0000

Type Values Removed Values Added
First Time appeared Klever-io
Klever-io klever-go
Vendors & Products Klever-io
Klever-io klever-go

Fri, 07 Aug 2026 23:00:00 +0000

Type Values Removed Values Added
Description Klever-Go is the Go implementation of the Klever blockchain protocol. Versions from 1.7.14 through 1.7.17 are vulnerable to a remotely triggerable denial of service. Both REST APIs are started with the Gin Engine.Run convenience method, which serves requests through Go's default HTTP server with no ReadHeaderTimeout, ReadTimeout, or MaxHeaderBytes configured. As a result, incoming connections that never complete their request headers are held open indefinitely. When a REST listener is reachable beyond localhost through the documented all-interface bind or a Docker port-publish deployment, a single unauthenticated client can open many slow-header connections and hold them open until server file descriptors are exhausted, preventing the API from accepting new connections. This renders the REST API unavailable to legitimate clients. This issue is fixed in version 1.7.18.
Title Klever-Go: REST API slow-header connection exhaustion via Gin Engine.Run
Weaknesses CWE-400
CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Klever-io Klever-go
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-11T01:22:30.059Z

Reserved: 2026-06-08T21:44:27.364Z

Link: CVE-2026-52880

cve-icon Vulnrichment

Updated: 2026-08-11T01:22:25.513Z

cve-icon NVD

Status : Received

Published: 2026-08-07T23:17:04.890

Modified: 2026-08-11T02:16:51.483

Link: CVE-2026-52880

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-08T00:30:17Z

Weaknesses