CVE-2026-7776
Boundary Workers Vulnerable to Denial of Service During TLS Handshake
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-770 |
| Vendor | hashicorp |
| Product | boundary |
| Published | May 4, 2026 |
| Last Updated | May 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
HashiCorp / Boundary
0.9.0 < 0.21.3
HashiCorp / Boundary Enterprise
0.9.0 < 0.21.3
References
Credits
This issue was identified by the Boundary Engineering team.