CVE-2026-110720

Consul-k8s vulnerable to a cross-namespace authorization bypass in component ACL binding rules

At a glance

Severity: CRITICAL 9.9
EPSS: EPSS 0.36 % · percentile 30 (2026-10-27)
State: PUBLISHED
Published: 2026-10-26
Updated: 2026-10-26
Assigner: HashiCorp
NVD status: Awaiting Analysis

Description

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	HashiCorp
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · security@hashicorp.com (Secondary)

Weaknesses (CWE)

CWE-863

European references

ENISA EUVD · EUVD-2026-110070
GCVE · GCVE-0-2026-110720

Affected products

Product	Versions
HashiCorp · Tooling	affected 0.42.0 < 2.0.4

References

https://discuss.hashicorp.com/t/hcsec-2026-50-consul-k8s-vulnerable-to-a-cross-namespace-authorization-bypass-in-component-acl-binding-rules/77915

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD