Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-52879— Klever-Go: Unbounded goroutine spawn on direct-message ingress enables peer-driven DoS

Quick assessment

Affected
klever-io klever-go
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Klever是Klever组织的一个高性能区块链网络，专为去中心化应用、资产管理和智能合约执行而设计。 Klever 1.7.14版本至1.7.17版本存在资源管理错误漏洞，该漏洞源于直接消息入口处理程序在防洪水层准入决策前为每个传入消息创建新goroutine且无并发限制，可能导致远程拒绝服务攻击。

CVSS 7.5 · High EPSS 0.49% · P40

Affected Version Matrix 1

VendorProduct Version RangeStatus
klever-io klever-go >= 1.7.14, < 1.7.18 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-52879

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Klever-Go: Unbounded goroutine spawn on direct-message ingress enables peer-driven DoS
Source: CVE Program / CVE List V5
Vulnerability Description
Klever-Go is the Go implementation of the Klever blockchain protocol. In versions 1.7.14 through 1.7.17, the direct-message ingress handler spawns a new goroutine for every incoming direct message before the processor-level antiflood layer makes any admission decision, with no semaphore, throttler, or bound on the number of concurrent in-flight spawns. Because the antiflood check runs inside the spawned goroutine rather than before it, a single connected peer can open a direct-send stream and send a stream of well-formed messages to force unbounded goroutine creation, where each goroutine allocates its own stack and holds a message reference until processing completes, adding scheduler and garbage-collection pressure faster than the runtime can drain it. This lets one peer degrade the node's availability and its ability to process legitimate traffic, resulting in a remotely triggerable denial of service. The issue is fixed in 1.7.18.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Klever 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Klever是Klever组织的一个高性能区块链网络，专为去中心化应用、资产管理和智能合约执行而设计。 Klever 1.7.14版本至1.7.17版本存在资源管理错误漏洞，该漏洞源于直接消息入口处理程序在防洪水层准入决策前为每个传入消息创建新goroutine且无并发限制，可能导致远程拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
klever-io klever-go >= 1.7.14, < 1.7.18 -

II. Public POCs for CVE-2026-52879

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10497 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-52879

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-52879 (2)

Same Patch Batch · klever-io · 2026-08-07 · 6 CVEs total

CVE-2026-52878 7.5 HIGH Klever-Go: Unauthenticated nil-pointer DoS in P2P transaction validation can halt the chai
CVE-2026-47249 7.5 HIGH Klever-Go KVM: Hash-array amplification in P2P resolver request handling
CVE-2026-52880 7.5 HIGH Klever-Go: REST API slow-header connection exhaustion via Gin Engine.Run
CVE-2026-58262 7.1 HIGH Klever-Go: PubKeysBitmap padding bits bypass the BLS signature quorum
CVE-2026-49343 5.9 MEDIUM Klever-Go KVM: Throttler slot leak in trie account-data sync causes epoch bootstrap / stat

IV. Related Vulnerabilities

Same product: klever-go
Same vendor: klever-io
Same weakness: CWE-400

V. Comments for CVE-2026-52879

No comments yet

Leave a comment