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TI-2026-80532 Aliases CVE-2026-105765GHSA-g3r6-g7m5-3qf5

Consul authorization bypass exposes leaf certificates and private keys

Priority LOW 38CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-862.

Summary

HashiCorp Consul and Consul Enterprise from 1.17.0 before 2.1.0 contain an authorization bypass in the agent's service mesh leaf certificate API (CVE-2026-105765, CWE-862 Missing Authorization). An attacker without a valid ACL token can retrieve a cached service leaf certificate and its private key. The CVSS 3.1 base score is 7.5 (HIGH).

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

HashiCorp Consul and Consul Enterprise 1.17.0 up to 2.0.4 are vulnerable to an authorization bypass in the agent's service mesh leaf certificate API that may allow an attacker without a valid ACL token to retrieve a cached service leaf certificate and its private key. This vulnerability (CVE-2026-105765) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00237 14th percentileScored 2026-11-07
Fix Partial Consul (HashiCorp): 2.1.0Consul Enterprise (HashiCorp): 2.1.0Red Hat: 1 without a fix

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
HashiCorpConsul1.17.0 to before 2.1.02.1.0Patch availableCNA
HashiCorpConsul Enterprise1.17.0 to before 2.1.02.1.0Patch availableCNA
  • Consul VendorHashiCorp Affected 1.17.0 to before 2.1.0 Fixed in 2.1.0 Patch available CNA
  • Consul Enterprise VendorHashiCorp Affected 1.17.0 to before 2.1.0 Fixed in 2.1.0 Patch available CNA

Remediation

Upgrade Consul Community Edition to 2.1.0, and Consul Enterprise to 2.1.0 or 1.21.19. Red Hat rates this Important, and Red Hat Enterprise Linux 9 has no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Consul (HashiCorp) Fixed in 2.1.0
  • Fix · CNA Consul Enterprise (HashiCorp) Fixed in 2.1.0

Fixed in the same release

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

  • Release ·

    HashiCorp Consul, Consul Enterprise 2.1.0

    4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-80535 Authorization bypass in Consul service mesh proxy registrationPriority MEDIUM 40
    • TI-2026-80543 Denial of service in HashiCorp Consul HTTP API exhausts memoryPriority LOW 39
    • TI-2026-80544 Authorization bypass in HashiCorp Consul health check registrationPriority LOW 28
    Show all 4 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Not affected: 1 product
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-105765
  2. 2026-10-26 Title updated · CNA
  3. 2026-10-27 Alias added: GHSA-g3r6-g7m5-3qf5
  4. 2026-10-27 Priority changed: MEDIUM → LOW
  5. 2026-11-02 Affected versions changed · Red Hat
  6. 2026-11-02 CVSS score added · Red Hat
  7. 2026-11-02 CISA SSVC decision points changed
  8. 2026-11-06 Affected versions changed · Red Hat

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