CVE-2026-34227

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

State
Published
Severity
5.9 Medium
Published
Mar 31, 2026
Updated
Apr 1, 2026
Reserved
Mar 26, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.05.9 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:L/SC:N/SI:N/SA:NGitHub_M

Weaknesses

  • CWE-306 Missing Authentication for Critical Function
  • CWE-942 Permissive Cross-domain Policy with Untrusted Domains

Affected Products

ProductVersions
sliverBishopFox
  • < 1.7.4Affected

References

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