---
cve: "CVE-2026-52879"
severity: "HIGH"
cvss: 7.5
epss: "29%"
vendor: "klever-io"
kev: false
exploited: false
published: "2026-08-07 23:17:04"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T00:24:06+02:00"
---

# CVE-2026-52879

> 7.5 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 785b77ccb27162506c888cb62657cd7117d23126 (Commit)

## Referenzen

- <https://github.com/klever-io/klever-go/security/advisories/GHSA-hf2g-6j7h-98wg>
- <https://github.com/klever-io/klever-go/releases/tag/v1.7.18>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-52879) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_