CVE-2026-105608

Consul vulnerable to an authorization bypass in service mesh registration

8.8 High

HashiCorp Consul and Consul Enterprise are vulnerable to an authorization bypass in service mesh proxy registration. This may allow a user with service write permission to apply Envoy escape-hatch configuration without the required mesh write permission. This vulnerability (CVE-2026-105608) 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: High
Integrity: High
Availability: High

Exploit likelihood

0.45%Unchanged since Oct 27, 2026

What each source reports

CVE List Score used 8.8

Consul vulnerable to an authorization bypass in service mesh registration

Record: CVE-2026-105608
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-178
Updated: 2026-11-02

EUVDEUVD-2026-110053 8.8

Record: EUVD-2026-110053
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-5jgf-46qp-g9jf 8.8

HashiCorp Consul and Consul Enterprise are vulnerable to an authorization bypass in service mesh...

Record: GHSA-5jgf-46qp-g9jf
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-178
Updated: 2026-11-02

NVD 8.8

Record: CVE-2026-105608
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-178
Updated: 2026-11-02

OSV 8.8

Consul vulnerable to an authorization bypass in service mesh registration

Record: CVE-2026-105608
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-178
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-105608 8.8

Record: UBUNTU-CVE-2026-105608
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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-2026-105608 is a high vulnerability (CVSS 8.8) 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 0.45%, the 39th percentile. No source names a fixed version.