---
title: "CVE-2026-90651: Socket Firewall - Man-in-the-Middle"
description: "Socket Firewall before 2.0.0 contains a man-in-the-middle vulnerability caused by disabled TLS certificate verification in default configuration, letting attackers intercept and modify traffic between the firewall and upstream services, exploit requires attacker to intercept network traffic."
url: https://panop.io/threat-heartbeat/CVE-2026-90651/
---

# CVE-2026-90651 Socket Firewall - Man-in-the-Middle

Socket Firewall before 2.0.0 contains a man-in-the-middle vulnerability caused by disabled TLS certificate verification in default configuration, letting attackers intercept and modify traffic between the firewall and upstream services, exploit requires attacker to intercept network traffic.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.21% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90651)

## Details

Type

Man-in-the-Middle

Impact

Man In The Middle, Data Tampering

CVSS vector

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

Published

13 September 2026

Updated

15 October 2026

Weakness

[CWE-295](https://cwe.mitre.org/data/definitions/295.html)

## Vendor fix

Update to version 2.0.0 or later where TLS verification defaults to enabled.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90651](https://nvd.nist.gov/vuln/detail/CVE-2026-90651)
- [https://docs.socket.dev/docs/registry-mode-configuration-reference](https://docs.socket.dev/docs/registry-mode-configuration-reference)
- [https://github.com/SocketDev/socket-registry-firewall/releases/tag/v2.0.0](https://github.com/SocketDev/socket-registry-firewall/releases/tag/v2.0.0)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)