# CVE-2025-27093: GO-2025-4079 - Silver has unrestricted traffic between Wireguard clients in github.com/bishopfox/sliver

Source: https://junglewise.ai/threats/cve-2025-27093-silver-has-unrestricted-traffic-between-wireguard-clients  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-10-28  
License: CC BY 4.0 with a link back

CVE-2025-27093 · Severity: medium · CVSS 6.3 · Published 2025-10-28

Sliver is a command and control framework that uses a custom Wireguard netstack. In versions 1.5.43 and earlier, and in development version 1.6.0-dev, the netstack does not limit traffic between Wireguard clients. This allows clients to communicate with each other unrestrictedly, potentially enabling leaked or recovered keypairs to be used to attack operators or allowing port forwardings to be accessible from other implants.

Technologies: [github.com/bishopfox/sliver (Go)](https://junglewise.ai/threats/technologies/github-com-bishopfox-sliver). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2025-27093 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-27093 being exploited in the wild.

**How severe is CVE-2025-27093?** Medium severity, with a CVSS score of 6.3, published 28 October 2025.

**Which products and versions are affected?** github.com/bishopfox/sliver (Go) SEMVER:introduced=0,fixed=1.5.44.

**Is there a fix for CVE-2025-27093?** Yes. github.com/bishopfox/sliver (Go): upgrade to 1.5.44 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-27093?** Check whether you run github.com/bishopfox/sliver (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/bishopfox/sliver (Go): upgrade to 1.5.44 or later

  ```sh
  go get github.com/bishopfox/sliver@v1.5.44
  ```


## Affected products

- github.com/bishopfox/sliver (Go) SEMVER:introduced=0,fixed=1.5.44

## Identifiers

- CVE-2025-27093
- GHSA-q8j9-34qf-7vq7
- GO-2025-4079

## Related threats

- [Sliver unauthenticated memory exhaustion in HTTP(S) listener](https://junglewise.ai/threats/cve-2026-77622-sliver-unauthenticated-memory-exhaustion-denial-of-service-in)
- [GO-2026-4899 - Sliver: Nil Pointer Dereference in tunnelCloseHandler causes panic when a reverse tunnel (rportfwd)…](https://junglewise.ai/threats/go-2026-4899-sliver-nil-pointer-dereference-in-tunnelclosehandler-bd83eea8)
- [BishopFox Sliver unauthenticated remote access in MCP interface](https://junglewise.ai/threats/cve-2026-34227-bishopfox-sliver-unauthenticated-remote-access-in-mcp-interface)
- [Sliver: Nil Pointer Dereference in tunnelCloseHandler causes panic when a reverse tunnel (rportfwd) close is attempted](https://junglewise.ai/threats/sliver-nil-pointer-dereference-in-tunnelclosehandler-causes-panic-when-df5d6c15)
- [Sliver Vulnerable to Authenticated OOM via Memory Exhaustion in mTLS/WireGuard Transports](https://junglewise.ai/threats/cve-2026-32941-sliver-vulnerable-to-authenticated-oom-via-memory-exhaustion-in)