HashiCorp Boundary/Boundary Enterprise up to 0.19.4/0.20.2/0.21.2 Node Enrollment TLS Handshake allocation of resources

Summaryinfo

A vulnerability classified as problematic has been found in HashiCorp Boundary and Boundary Enterprise up to 0.19.4/0.20.2/0.21.2. This impacts an unknown function of the component Node Enrollment TLS Handshake Handler. The manipulation leads to allocation of resources. This vulnerability is listed as CVE-2026-7776. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in HashiCorp Boundary and Boundary Enterprise up to 0.19.4/0.20.2/0.21.2. This issue affects some unknown processing of the component Node Enrollment TLS Handshake Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. The summary by CVE is:

Boundary Community Edition and Boundary Enterprise (“Boundary”) workers are vulnerable to a denial-of-service condition during node enrollment TLS handshakes. An attacker with network access to the worker authentication listener may open a connection and delay or withhold the client certificate during the TLS handshake, causing worker connection handling to block. This may prevent legitimate worker connections from being accepted or routed. This vulnerability, CVE-2026-7776, is fixed in Boundary 0.21.3, 0.20.3, 0.19.5.

The advisory is shared at discuss.hashicorp.com. The identification of this vulnerability is CVE-2026-7776 since 05/04/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 0.19.5, 0.20.3 or 0.21.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-27145). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• HashiCorp

Name

• Boundary
• Boundary Enterprise

Version

• 0.19.0
• 0.19.1
• 0.19.2
• 0.19.3
• 0.19.4
• 0.20.0
• 0.20.1
• 0.20.2
• 0.21.0
• 0.21.1
• 0.21.2

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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