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TI-2026-80556 Aliases CVE-2026-110720GHSA-3rqq-8xjm-v58x

Cross-namespace authorization bypass in Consul-k8s ACL binding rules

Priority MEDIUM 43CWE-863Published · Updated

Key facts

Attack vector
Network
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-863.

Summary

Consul-k8s versions from 0.42.0 before 2.0.4 are affected by an incorrect authorization flaw (CWE-863) in component ACL binding rules. An attacker can cross namespace boundaries and obtain elevated Consul privileges.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Consul-k8s versions 0.42.0 and later are vulnerable to a cross-namespace authorization bypass in component ACL binding rules that may allow an attacker to obtain elevated Consul privileges. This vulnerability (CVE-2026-110720) is fixed in consul-k8s 2.1.0 and 1.8.18.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00365 30th percentileScored 2026-11-07
Fix Fixed Tooling (HashiCorp): 2.0.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
HashiCorpTooling0.42.0 to before 2.0.42.0.4Patch availableCNA
  • Tooling VendorHashiCorp Affected 0.42.0 to before 2.0.4 Fixed in 2.0.4 Patch available CNA

Remediation

Upgrade Consul-k8s to 2.0.4 as listed in the affected data, or to 2.1.0 or 1.8.18 as the source description states.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Tooling (HashiCorp) Fixed in 2.0.4

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-110720
  2. 2026-10-26 CISA SSVC decision points changed
  3. 2026-10-27 Alias added: GHSA-3rqq-8xjm-v58x

References

Other 1

  • TI-2024-01904 Vault Cert Auth Method Did Not Correctly Validate Non-CA Certificates CVSS 3.1CRITICAL 9.8
  • TI-2021-18437 HashiCorp Consul Enterprise before 1.8.17, 1.9.x before 1.9.11, and 1.10.x before 1.10.4… CVSS 3.1HIGH 8.8
  • TI-2026-06570 Nomad vulnerable to path traversal in dynamic host volume which may lead to code execution CVSS 3.1HIGH 8.8
  • TI-2020-17753 The official Consul Docker images 0.7.1 through 1.4.2 contain a blank password for a root… CVSS 3.1CRITICAL 9.8
  • TI-2026-13641 consul-mcp-server vulnerable to cross-tenant credential reuse in streamable-HTTP stateless mode CVSS 3.1CRITICAL 10.0
  • TI-2026-13778 terraform-mcp-server vulnerable to cross-tenant credential reuse in streamable-HTTP stateless mode CVSS 3.1CRITICAL 10.0
See all 246 →

Sources

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