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TI-2026-59475 Aliases CVE-2026-87090GHSA-mjp7-4wvg-9f57

Consul vulnerable to an authorization bypass in the catalog node-write path

Priority LOW 36CWE-863Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog node-write path that may allow an authenticated attacker to delete another node's catalog registration and take over its node identity. An attacker with a token granting node-write permission on any single node name may exploit this issue if they can obtain the node ID of a node they do not control. This vulnerability (CVE-2026-87090) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Fix Fixed Consul (HashiCorp): 2.0.4Consul Enterprise (HashiCorp): 2.0.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
HashiCorpConsul0.1.0 to before 2.0.42.0.4Patch availableCNA
HashiCorpConsul Enterprise0.1.0 to before 2.0.42.0.4Patch availableCNA
  • Consul VendorHashiCorp Affected 0.1.0 to before 2.0.4 Fixed in 2.0.4 Patch available CNA
  • Consul Enterprise VendorHashiCorp Affected 0.1.0 to before 2.0.4 Fixed in 2.0.4 Patch available CNA

Remediation

  • Fix · CNA Consul (HashiCorp) Fixed in 2.0.4
  • Fix · CNA Consul Enterprise (HashiCorp) Fixed in 2.0.4

Fixed in the same release

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

  • Release ·

    HashiCorp Consul, Consul Enterprise 2.0.4

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-60046 Consul vulnerable to an authorization bypass in the Connect service meshPriority LOW 33
    • TI-2026-59477 Consul vulnerable to a denial of service in the native RPC listenerPriority LOW 29
    • TI-2026-59478 Consul vulnerable to an authorization bypass in the catalog deregistration pathPriority LOW 24
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-87090
  2. 2026-10-03 Alias added: GHSA-mjp7-4wvg-9f57

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