Auth bypass in Vanus-Labs Vanus
CVE-2026-111999
Vanus 0.8.0 through 0.9.0 contains a missing authentication vulnerability that allows unauthenticated remote attackers to publish events to any eventbus through the gateway CloudEvents HTTP receiver. Attackers can send forged CloudEvents to the /namespaces/{ns}/eventbus/{name}/events or legacy /gateway/{name} paths, bypassing token authentication and authPublish checks, so they are stored and delivered to subscription sinks.
Vulnerability class: Broken Authentication
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/vanus-labs/vanus/issues/647 (issue-tracking)
- github.com/vanus-labs/vanus/blob/v0.9.0/internal/gateway/gateway.go (technical-description)
- www.vulncheck.com/advisories/vanus-0.8.0-through-0.9.0-missing-authentication-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111999?
- CVE-2026-111999 is a high-severity vulnerability in Vanus-Labs Vanus, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-10-18.
- How severe is CVE-2026-111999?
- High severity. CVSS v3 base score is 7.5 out of 10.