Missing Authentication Vulnerability in Vanus Gateway Eventbus
CVE-2026-111999

8.7HIGH

Key Information:

Vendor

Vanus-labs

Status
Vanus
Vendor
CVE Published:
18 October 2026

What is CVE-2026-111999?

The Vanus platform, specifically versions 0.8.0 through 0.9.0, is susceptible to a missing authentication vulnerability. This flaw enables unauthorized attackers to publish events to the eventbus via the CloudEvents HTTP receiver without proper authentication. By exploiting this vulnerability, attackers can send forged CloudEvents to designated paths, significantly bypassing token authentication and the necessary authPublish checks. As a result, these events may be stored and delivered to subscription sinks, posing a serious threat to the integrity of event processing and data security.

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://www.vulncheck.com/advisories/vanus-0.8.0-through-...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

MJ DHURGESH
.