CVE-2026-110720: Consul-k8s versions 0.42.0 and later are vulnerable to a cross-namespace authorization bypass in component ACL

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CRITICAL 9.9

CVE-2026-110720 is a critical-severity flaw (CVSS 9.9) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 this priority

Critical severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-10-26
Last modified	2026-10-26

Publisher (CNA): HashiCorp Inc.

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-10-26 19:16 UTCPublished CVE record published
2026-10-26 20:17 UTCUpdated Record last modified

Advisories and coverage

Official advisories

HashiCorp Security: HCSEC-2026-50 - Consul-k8s vulnerable to a cross-namespace authorization bypass in component ACL binding rules 2026-10-26

Research and news

Vulners Bulletins: CVE-2026-110720 2026-10-26
Vulners Bulletins: CVE-2026-110720 2026-10-26

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-110720?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-110720 being exploited?

CVE-2026-110720 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-110720 affect?

CVE-2026-110720 affects affected software. Severity is critical (CVSS 9.9). 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 c

How urgent is CVE-2026-110720?

Priority 42/100. Critical severity

Software pages

Kubernetes vulnerabilities · Consul vulnerabilities

References

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