CVE-2026-115804

Consul vulnerable to an authorization bypass in health check registration

6.4 Medium

HashiCorp Consul and Consul Enterprise are vulnerable to an authorization bypass in health check registration that may allow an authenticated user to modify health checks belonging to another service on the same node. This vulnerability (CVE-2026-115804) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: Low

Exploit likelihood

0.29%Unchanged since Oct 27, 2026

What each source reports

CVE List Score used 6.4

Consul vulnerable to an authorization bypass in health check registration

Record: CVE-2026-115804
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
Weakness: CWE-639
Updated: 2026-11-02

EUVDEUVD-2026-110064 6.4

Record: EUVD-2026-110064
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-9vq3-c4rf-pm8v 6.4

HashiCorp Consul and Consul Enterprise are vulnerable to an authorization bypass in health check...

Record: GHSA-9vq3-c4rf-pm8v
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
Weakness: CWE-639
Updated: 2026-11-02

NVD 6.4

Record: CVE-2026-115804
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
Weakness: CWE-639
Updated: 2026-11-02

OSV 6.4

Consul vulnerable to an authorization bypass in health check registration

Record: CVE-2026-115804
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
Weakness: CWE-639
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-115804 6.4

Record: UBUNTU-CVE-2026-115804
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`consul` Ubuntu:18.04:LTS	All versions, plus listed versions 0.6.4~dfsg-3	None known
`consul` Ubuntu:20.04:LTS	All versions, plus listed versions 1.0.7~dfsg1-5ubuntu11.4.4~dfsg1-2ubuntu21.5.2+dfsg1-61.5.2+dfsg1-101.5.2+dfsg1-121.5.2+dfsg2-14	None known
`consul` Ubuntu:22.04:LTS	All versions, plus listed versions 1.7.4+dfsg1-11.8.7+dfsg1-3	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-115804 is a medium vulnerability (CVSS 6.4) in Hashicorp Consul, published October 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. No source names a fixed version.