Vanus CloudEvents gateway receiver missing authentication
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
Vanus versions 0.8.0 through 0.9.0 do not require authentication on the gateway CloudEvents HTTP receiver. An unauthenticated remote attacker can send forged CloudEvents to publish events to any eventbus, and those events are stored and delivered to subscription sinks. The flaw is classified as CWE-306, missing authentication for a critical function.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| vanus-labs | vanus | 0.8.0 – 0.9.0 | — | No fix listed | CNA |
- vanus Vendorvanus-labs Affected 0.8.0 – 0.9.0 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for vanus. Vanus versions 0.8.0 through 0.9.0 are affected.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-18 Threatist record created from CVE-2026-111999
- 2026-10-18 Alias added: GHSA-v6f2-wm97-3p2m
- 2026-10-19 Priority changed: MEDIUM → LOW
- 2026-10-20 CISA SSVC decision points changed
- 2026-10-20 Priority changed: LOW → MEDIUM
References
More vanus-labs vulnerabilities
- TI-2026-76150 Default admin credentials in Vanus gateway allow cluster takeover CVSS 4.0CRITICAL 9.3
- TI-2026-76152 Missing authorization in Vanus gateway enables subscription hijacking CVSS 4.0HIGH 7.2
Sources
- CVE-2026-111999 · CVE Program
- CVE-2026-111999 · NVD
- FIRST EPSS
- GHSA-v6f2-wm97-3p2m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences