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TI-2026-86107 Aliases CVE-2026-65960

Tetragon gRPC admin API accessible without authentication from hostNetwork pods

Priority LOW 37CWE-306Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

Tetragon versions before 1.7.0 can use a Helm default that exposes the privileged Tetragon gRPC API through an unauthenticated TCP listener on localhost:54321. An attacker who can run or compromise same-node hostNetwork pods can reach that listener and invoke privileged methods without authentication. These methods can add, delete, or reconfigure tracing policies and change debug settings, which may lead to privilege escalation or container escape. Deployments that do not expose an unauthenticated TCP listener are not affected.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Tetragon is an eBPF-based security observability and runtime enforcement project. Versions before 1.7.0 can use a Helm default that exposes the privileged Tetragon gRPC API through an unauthenticated TCP listener on localhost:54321. An attacker who can run or compromise same-node hostNetwork pods can reach the listener and invoke privileged methods without authentication. These methods can add, delete, or reconfigure tracing policies and change debug settings, potentially resulting in privilege escalation or container escape. Version 1.7.0 changes the default endpoint to a Unix-domain socket. Deployments that do not expose an unauthenticated TCP listener are not affected.

Why it matters now

EPSS 0.00139 3rd percentileScored 2026-11-07
Fix Fixed tetragon (cilium): 1.7.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ciliumtetragonbefore 1.7.01.7.0Patch availableCNA
  • tetragon Vendorcilium Affected before 1.7.0 Fixed in 1.7.0 Patch available CNA

Remediation

Upgrade Tetragon to version 1.7.0 or later. Version 1.7.0 changes the default endpoint to a Unix-domain socket.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA tetragon (cilium) Fixed in 1.7.0

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-65960
  2. 2026-11-08 Priority changed: MEDIUM → LOW

References

Other 5

  • TI-2024-32092 CIDR deny policies may not take effect when a more narrow CIDR allow is present CVSS 3.1HIGH 8.7
  • TI-2026-09219 cilium ebpf LoadCollectionSpec/LoadCollectionSpecFromReader btf.go loadRawSpec integer overflow CVSS 4.0MEDIUM 4.8
  • TI-2023-12305 Cilium eBPF filters may be temporarily removed during agent restart CVSS 3.1CRITICAL 9.8
  • TI-2023-20486 Cilium NetworkPolicy bypass via pod labels CVSS 3.1CRITICAL 9.0
  • TI-2022-11721 Incorrect Default Permissions in Cilium CVSS 3.1HIGH 8.8
  • TI-2026-36600 Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access CVSS 3.1CRITICAL 9.2
See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences