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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-7x9r-wcgg-w86f Hashicorp Boundary workers are vulnerable to a denial-of-service condition during node enrollment TLS handshakes
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 06 May 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Hashicorp
Hashicorp boundary
Hashicorp boundary Enterprise
Vendors & Products Hashicorp
Hashicorp boundary
Hashicorp boundary Enterprise

Tue, 05 May 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 04 May 2026 21:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Boundary Workers Vulnerable to Denial of Service During TLS Handshake
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: HashiCorp

Published:

Updated: 2026-05-05T14:14:05.799Z

Reserved: 2026-05-04T15:10:16.232Z

Link: CVE-2026-7776

cve-icon Vulnrichment

Updated: 2026-05-05T13:21:01.342Z

cve-icon NVD

Status : Deferred

Published: 2026-05-04T22:16:20.330

Modified: 2026-05-05T20:24:04.853

Link: CVE-2026-7776

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-06T09:22:31Z

Weaknesses