CVE-2026-19016

Authorization bypass for session deletion in the transaction API

State: Published
Severity: 4.2 Medium
Published: Aug 7, 2026
Updated: Aug 10, 2026
Reserved: Aug 5, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	4.2 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L	HashiCorp

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory (Path Traversal)

Affected Products

Product	Versions
ConsulHashiCorp	1.19.1 to before 2.0.3Affected
Consul EnterpriseHashiCorp	1.19.1 to before 2.0.3Affectedfrom 1.21.17Not affectedfrom 1.22.11Not affected

References

https://discuss.hashicorp.com/t/hcsec-2026-25-multiple-vulnerabilities-impacting-hashicorp-consul/77629

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