Kong Mesh: the kuma-dp readiness service exposes the Envoy admin API without authentication
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure, Security bypass
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200 and CWE-306.
Summary
When kuma-dp is configured with the Envoy admin API on a Unix domain socket, which is the default, its readiness service on TCP port 9902 - bound to all interfaces - forwards almost the entire Envoy admin API to any caller that can reach the port, with no authentication. An attacker with network access to a data plane's port 9902, for example another pod on the cluster network, can read Envoy and data plane configuration without credentials: config dumps, cluster and listener lists, stats, and the mesh trust bundle. Exposure is read-only - destructive Envoy admin actions are blocked and private keys are not exposed.
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
Remediation
- Fix · CNA Kong Mesh (Kong Inc.) Fixed in 2.14.2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18673
- 2026-10-03 Alias added: GHSA-jcrf-7pr5-jv5v
References
More Kong Inc. vulnerabilities
- TI-2020-17871 The official kong docker images before 1.0.2-alpine (Alpine specific) contain a blank… CVSS 3.1CRITICAL 9.8
- TI-2025-00925 Arbitrary Code Execution in Kong Insomnia Desktop Application CVSS 4.0CRITICAL 9.3
- TI-2026-12562 Kong API Gateway Enterprise: SAML Authentication bypass CVSS 4.0HIGH 7.7
- TI-2026-12561 Kong API Gateway Enterprise: JWT Algorithm-Confusion CVSS 4.0HIGH 7.7
- TI-2020-18854 Kong lua-multipart multipart.lua is_header redos CVSS 3.1HIGH 7.5
- TI-2026-70893 SQL injection in Kong Gateway clustering communication CVSS 4.0HIGH 7.5
Sources
- CVE-2026-18673 · CVE Program
- CVE-2026-18673 · NVD
- FIRST EPSS
- GHSA-jcrf-7pr5-jv5v · GitHub Advisory Database · CC BY 4.0
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