Missing authorization in Vanus gateway enables subscription hijacking
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
Vanus versions 0.8.0 through 0.9.0 contain a missing authorization flaw (CWE-862) in the gateway. Any authenticated user can call Subscribe, Ack and unregistered methods without permission checks, so an attacker can supply another tenant's subscription ID to hijack it, read and acknowledge its events, and starve the legitimate consumer. The ListUser method also lets such a user enumerate cluster users. The attack needs low-privilege authenticated access over the network.
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 authorization vulnerability in the gateway that allows any authenticated user to call Subscribe, Ack, and unregistered methods without permission checks. Attackers can supply another tenant's subscription ID to Subscribe to hijack it, read and acknowledge its events, starve the legitimate consumer, and enumerate cluster users via ListUser.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-18 Threatist record created from CVE-2026-112000
- 2026-10-18 Alias added: GHSA-93jv-pwc6-2cqf
- 2026-10-19 Priority changed: MEDIUM → LOW
- 2026-10-22 CISA SSVC decision points changed
References
Other 4
- https://github.com/vanus-labs/vanus/issues/647
- https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/gateway/auth/interceptor.go#L35-L40
- https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/gateway/auth/auth.go#L97-L110
- https://github.com/vanus-labs/vanus/blob/v0.9.0/internal/gateway/proxy/proxy.go#L256-L300
More vanus-labs vulnerabilities
- TI-2026-76150 Default admin credentials in Vanus gateway allow cluster takeover CVSS 4.0CRITICAL 9.3
- TI-2026-76151 Vanus CloudEvents gateway receiver missing authentication CVSS 4.0HIGH 8.7
Sources
- CVE-2026-112000 · CVE Program
- CVE-2026-112000 · NVD
- FIRST EPSS
- GHSA-93jv-pwc6-2cqf · GitHub Advisory Database · CC BY 4.0
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