HashiCorp Consul/Consul Enterprise up to 2.0.2 Transaction API permission

Summaryinfo

A vulnerability classified as very critical was found in HashiCorp Consul and Consul Enterprise. The impacted element is an unknown function of the component Transaction API. Such manipulation leads to permission. This vulnerability is documented as CVE-2026-19016. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in HashiCorp Consul and Consul Enterprise and classified as very critical. Affected by this issue is an unknown function of the component Transaction API. The manipulation with an unknown input leads to a permission vulnerability. Using CWE to declare the problem leads to CWE-275. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at discuss.hashicorp.com. This vulnerability is handled as CVE-2026-19016 since 08/05/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/07/2026). This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

Upgrading to version 2.0.3, 1.21.17, 1.22.11 or 2.0.3 eliminates this vulnerability.

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Productinfo

Vendor

• HashiCorp

Name

• Consul
• Consul Enterprise

Version

• 1.19.1
• 1.20.x
• 1.21.0
• 1.21.1
• 1.21.2
• 1.21.3
• 1.21.4
• 1.21.5
• 1.21.6
• 1.21.7
• 1.21.8
• 1.21.9
• 1.21.10
• 1.21.11
• 1.21.12
• 1.21.13
• 1.21.14
• 1.21.15
• 1.21.16
• 2.0.0
• 2.0.1
• 2.0.2

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

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