CVE-2026-19016
Received Received - Intake

Session Deletion Bypass in Consul

Publication date: 2026-08-07

Last updated on: 2026-08-07

Assigner: HashiCorp Inc.

Description
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.

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Meta Information

Published
2026-08-07
Last Modified
2026-08-07
Generated
2026-08-08
AI Q&A
2026-08-07
EPSS Evaluated
N/A
NVD
CVE-2026-19016
EUVD
EUVD-2026-54605

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
hashicorp consul 1.19.1
hashicorp consul 2.0.2
hashicorp consul 2.0.3
hashicorp consul_enterprise 1.21.17
hashicorp consul_enterprise 1.22.11
hashicorp consul_enterprise 2.0.3

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

Consul Community Edition and Consul Enterprise versions 1.19.1 through 2.0.2 had a flaw where the {{session:write}} ACL permission was not enforced for session deletion via the transaction API. This allowed authenticated users with network access to the Consul server RPC port to delete arbitrary sessions without proper authorization.

Detection Guidance

To detect this vulnerability, check Consul server RPC port access logs for unauthorized session deletion attempts. Verify Consul versions against patched releases (2.0.3 or later for Community, 1.21.17/1.22.11/2.0.3 for Enterprise). Monitor for sessions being deleted without proper ACL permissions.

Impact Analysis

An attacker could exploit this to disrupt services relying on Consul sessions, leading to potential service outages or unauthorized session termination. This may cause instability in distributed systems managed by Consul.

Compliance Impact

The vulnerability allows unauthorized session deletion without proper ACL permissions, which could lead to unauthorized access or disruption of services. This may impact compliance with standards requiring strict access controls, such as GDPR (data protection) or HIPAA (healthcare data), by potentially enabling unauthorized data access or service interruptions.

Mitigation Strategies

Upgrade Consul Community Edition to version 2.0.3 or Consul Enterprise to versions 1.21.17, 1.22.11, or 2.0.3 to address the vulnerability.

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