CVE-2026-34227

HIGH

Sliver One-Click Remote Access: Insecure CORS & Unauthenticated MCP Interface

Title source: cna

Description

Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to version 1.7.4, a single click on a malicious link gives an unauthenticated attacker immediate, silent control over every active C2 session or beacon, capable of exfiltrating all collected target data (e.g. SSH keys, ntds.dit) or destroying the entire compromised infrastructure, entirely through the operator's own browser. This issue has been patched in version 1.7.4.

Exploits (1)

nomisec WORKING POC 1 stars
by skoveit · poc
https://github.com/skoveit/CVE-2026-34227

Scores

CVSS v3 8.8
EPSS 0.0002
EPSS Percentile 5.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-306 CWE-942
Status published
Products (3)
bishopfox/sliver < 1.7.4
bishopfox/sliver 0 - 1.7.4Go
BishopFox/sliver < 1.7.4
Published Mar 31, 2026
Tracked Since Mar 31, 2026