---
title: "CVE-2026-55176: Soft Machine - Broken Access Control"
description: "Soft Machine <= 0.2.247 contains a broken access control vulnerability caused by acceptance of a global shared secret as bearer token without workspace verification, letting tenants access and modify other tenants' workspace APIs, exploit requires access to user-facing process environment."
url: https://panop.io/threat-heartbeat/CVE-2026-55176/
---

# CVE-2026-55176 Soft Machine - Broken Access Control

Soft Machine <= 0.2.247 contains a broken access control vulnerability caused by acceptance of a global shared secret as bearer token without workspace verification, letting tenants access and modify other tenants' workspace APIs, exploit requires access to user-facing process environment.

CVSS base score 9.0 /10

Critical

CISA KEV

Not listed

Public exploit

None known

EPSS

0.20% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-55176)

## Details

Type

Broken Access Control

Impact

Data Tampering, Information Disclosure

CVSS vector

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

Published

30 September 2026

Updated

15 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Update to the latest version once a patch is available or implement per-workspace token verification for shared-secret bearer path.

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-2026-55176](https://nvd.nist.gov/vuln/detail/CVE-2026-55176)
- [https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj](https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj)

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## 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.

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