CVE-2026-34227
Sliver One-Click Remote Access: Insecure CORS & Unauthenticated MCP Interface
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.
INFO
Published Date :
March 31, 2026, 4:16 p.m.
Last Modified :
April 3, 2026, 2:54 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Sliver to version 1.7.4 or newer.
- Review and secure all C2 sessions.
- Monitor for unauthorized access attempts.
Public PoC/Exploit Available at Github
CVE-2026-34227 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34227.
| URL | Resource |
|---|---|
| https://github.com/BishopFox/sliver/security/advisories/GHSA-6fpf-248c-m7wm | Exploit Vendor Advisory |
| https://github.com/BishopFox/sliver/security/advisories/GHSA-6fpf-248c-m7wm | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34227 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34227
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34227 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34227 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 03, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:bishopfox:sliver:*:*:*:*:*:*:*:* versions up to (excluding) 1.7.4 Added Reference Type GitHub, Inc.: https://github.com/BishopFox/sliver/security/advisories/GHSA-6fpf-248c-m7wm Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/BishopFox/sliver/security/advisories/GHSA-6fpf-248c-m7wm Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 01, 2026
Action Type Old Value New Value Added Reference https://github.com/BishopFox/sliver/security/advisories/GHSA-6fpf-248c-m7wm -
New CVE Received by [email protected]
Mar. 31, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-306 Added CWE CWE-942 Added Reference https://github.com/BishopFox/sliver/security/advisories/GHSA-6fpf-248c-m7wm