CVE-2026-105608 Consul vulnerable to an authorization bypass in service mesh registration

High 8.8 Published 26 Oct 2026 Updated 26 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-105608?

CVE-2026-105608 is a high-severity vulnerability in HashiCorp Consul, published on 26 Oct 2026.

Official description

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.

Weakness: CWE-178

Which versions are affected by CVE-2026-105608?

How do I fix CVE-2026-105608?

No fix has been published for CVE-2026-105608 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-105608 being exploited?

There is no known exploitation of CVE-2026-105608 in the wild and no public exploit code.

Sources

Also known as GHSA-5jgf-46qp-g9jf, UBUNTU-CVE-2026-105608.