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Back to active CVEs
Medium · CVSS 6.5CVE-2026-87106

Consul vulnerable to a denial of service in the native RPC listenerCVE-2026-87106

Answer in brief

CVE-2026-87106 records a Medium severity (CVSS 6.5) vulnerability in Consul vulnerable to a denial of service in the native RPC listener. 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 Sep 10, 2026Updated Sep 10, 2026Source checked Oct 25, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.5. 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>=1.21.0 <2.0.42.0.4
HashiCorp/Consul Enterprisegeneric>=1.21.0 <2.0.42.0.4

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 2.0.4; HashiCorp/Consul Enterprise to 2.0.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 10, 2026

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

  2. Source modified

    Sep 10, 2026

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

  3. First seen by HOL

    Sep 10, 2026

Sources and claim methodology

  • Source referencediscuss.hashicorp.com
Upstream source description

Consul and Consul Enterprise are vulnerable to a denial of service in the native RPC listener that may allow an authenticated client to exhaust server memory before ACL authorization is evaluated. A client that can complete the internal RPC mTLS handshake may exploit this issue without holding a valid ACL token. This vulnerability (CVE-2026-87106) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • smg-project smg llm-multimodal jpeg_turbo.rs decode_jpeg_rgb memory allocationAlso CWE-400

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-400
Source
CVE List V5
Source checked
Oct 25, 2026
References
1 linked source
Open source record