Denial of Service Vulnerability in Klever Blockchain Protocol by Klever
CVE-2026-52880

7.5HIGH

Key Information:

Vendor

Klever-io

Status
Klever-go
Vendor
CVE Published:
7 August 2026

What is CVE-2026-52880?

The Klever-Go implementation of the Klever blockchain protocol contains a vulnerability that allows an unauthenticated attacker to initiate a denial of service attack. Specifically, versions 1.7.14 to 1.7.17 fail to configure essential HTTP server parameters, such as ReadHeaderTimeout and MaxHeaderBytes, which leads to prolonged holding of incomplete request headers. This situation permits a single attacker to create multiple slow-header connections, exhausting the server's file descriptors and rendering the REST API inaccessible to legitimate users. An effective fix is included in version 1.7.18, which addresses these configuration shortcomings.

Affected Version(s)

klever-go >= 1.7.14, < 1.7.18

References

https://github.com/klever-io/klever-go/security/advisorie...
x_refsource_CONFIRM
https://github.com/klever-io/klever-go/releases/tag/v1.7.18
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.