Read the docs
TI-2026-15541 Aliases CVE-2026-19016GHSA-7qhj-3fg3-mh5r

Authorization bypass for session deletion in the transaction API

Priority LOW 19CWE-22Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

Consul Community Edition and Consul Enterprise 1.19.1 through 2.0.2 did not enforce the {{session:write}} ACL permission for session deletion operations submitted through the transaction API. An authenticated caller with network access to the Consul server RPC port could delete arbitrary sessions without holding the required permission. This vulnerability, CVE-2026-19016, 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 0.00275 20th percentileScored 2026-11-07
Fix Partial Consul (HashiCorp): 2.0.3Consul Enterprise (HashiCorp): 2.0.3Red Hat: 1 without a fix

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
HashiCorpConsul1.19.1 to before 2.0.32.0.3Patch availableCNA
HashiCorpConsul Enterprise1.19.1 to before 2.0.32.0.3Patch availableCNA
  • Consul VendorHashiCorp Affected 1.19.1 to before 2.0.3 Fixed in 2.0.3 Patch available CNA
  • Consul Enterprise VendorHashiCorp Affected 1.19.1 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-2026-13374 Unauthenticated denial of service via unbounded external gRPC connection acceptancePriority MEDIUM 40
    • 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
    Show all 8 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19016
  2. 2026-10-03 Alias added: GHSA-7qhj-3fg3-mh5r

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