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Back to active CVEs
High · CVSS 8.8CVE-2026-105608

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

Answer in brief

CVE-2026-105608 records a High severity (CVSS 8.8) vulnerability in Consul vulnerable to an authorization bypass in service mesh registration. The current sources do not mark it as known exploited. The current feed maps HashiCorp/Consul (generic), HashiCorp/Consul Enterprise (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps HashiCorp/Consul (generic), HashiCorp/Consul Enterprise (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
HashiCorp/Consulgeneric>=2.0.4 <2.1.02.1.0
HashiCorp/Consul Enterprisegeneric>=2.0.4 <2.1.02.1.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for HashiCorp/Consul, HashiCorp/Consul Enterprise.
  2. 2Review the reported fix. Update HashiCorp/Consul to 2.1.0; HashiCorp/Consul Enterprise to 2.1.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 26, 2026

Sources and claim methodology

  • Source referencediscuss.hashicorp.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Consul vulnerable to a denial of service in HTTP APIsSame hashicorp/consul package
  • Consul vulnerable to an authorization bypass in the agent's service mesh leaf certificate APISame hashicorp/consul package
  • Consul vulnerable to an authorization bypass in health check registrationSame hashicorp/consul package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-178
Source
CVE List V5
Source checked
Oct 26, 2026
References
1 linked source
Open source record