Missing Authorization Flaw in Vanus Gateway Allows Unauthorized Method Access
CVE-2026-112000

7.2HIGH

Key Information:

Vendor

Vanus-labs

Status
Vanus
Vendor
CVE Published:
18 October 2026

What is CVE-2026-112000?

A security flaw in Vanus versions 0.8.0 and 0.9.0 allows any authenticated user to invoke critical methods such as Subscribe and Ack without proper permission checks. This vulnerability enables attackers to hijack subscriptions by using another tenant's subscription ID, potentially starving legitimate consumers and gaining unauthorized access to event data. Additionally, unauthorized users can enumerate cluster users via the ListUser method, exposing sensitive system information.

Affected Version(s)

vanus 0.8.0 <= 0.9.0

References

https://github.com/vanus-labs/vanus/issues/647
issue-tracking
https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/...
technical-description
https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/...
technical-description

CVSS V4

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

MJ DHURGESH
.