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TI-2026-13374 Aliases CVE-2026-15972GHSA-699f-92f5-m297

Unauthenticated denial of service via unbounded external gRPC connection acceptance

Priority MEDIUM 40CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Consul Community Edition and Consul Enterprise 1.13.0 through 2.0.2 are vulnerable to an unauthenticated denial of service through unbounded connection acceptance on the external gRPC listeners. A remote attacker may exhaust agent file descriptors, goroutines, and memory by opening many incomplete connections, potentially preventing legitimate clients from connecting. This vulnerability, CVE-2026-15972, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00549 46th percentileScored 2026-11-07
Fix Fixed Consul (HashiCorp): 2.0.3Consul Enterprise (HashiCorp): 2.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
HashiCorpConsul1.13.0 to before 2.0.32.0.3Patch availableCNA
HashiCorpConsul Enterprise1.13.0 to before 2.0.32.0.3Patch availableCNA
  • Consul VendorHashiCorp Affected 1.13.0 to before 2.0.3 Fixed in 2.0.3 Patch available CNA
  • Consul Enterprise VendorHashiCorp Affected 1.13.0 to before 2.0.3 Fixed in 2.0.3 Patch available CNA

Remediation

  • Fix · CNA Consul (HashiCorp) Fixed in 2.0.3
  • Fix · CNA Consul Enterprise (HashiCorp) Fixed in 2.0.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    HashiCorp Consul, Consul Enterprise 2.0.3

    8 records Highest priority Priority MEDIUM 1 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2026-15614 Unauthenticated denial of service via unbounded request body processingPriority LOW 30
    • TI-2026-15542 Consul vulnerable to partial arbitrary file read via Vault Connect CA providerPriority LOW 30
    • TI-2026-15540 Uncontrolled resource consumption in the Consul Connect CA roots endpointPriority LOW 30
    Show all 8 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-15972
  2. 2026-10-03 Alias added: GHSA-699f-92f5-m297

References

Other 1

  • TI-2024-01904 Vault Cert Auth Method Did Not Correctly Validate Non-CA Certificates CVSS 3.1CRITICAL 9.8
  • TI-2021-18437 HashiCorp Consul Enterprise before 1.8.17, 1.9.x before 1.9.11, and 1.10.x before 1.10.4… CVSS 3.1HIGH 8.8
  • TI-2026-06570 Nomad vulnerable to path traversal in dynamic host volume which may lead to code execution CVSS 3.1HIGH 8.8
  • TI-2020-17753 The official Consul Docker images 0.7.1 through 1.4.2 contain a blank password for a root… CVSS 3.1CRITICAL 9.8
  • TI-2026-13641 consul-mcp-server vulnerable to cross-tenant credential reuse in streamable-HTTP stateless mode CVSS 3.1CRITICAL 10.0
  • TI-2026-13778 terraform-mcp-server vulnerable to cross-tenant credential reuse in streamable-HTTP stateless mode CVSS 3.1CRITICAL 10.0
See all 246 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences