Boundary Workers Vulnerable to Denial of Service During TLS Handshake
Published May 4, 2026
7.5
HIGHCVSS 3.1
EPSS 0.34%
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.
Affected products
-
- Version 0.9.0StatusaffectedConstraints<0.21.3
- Version
-
- Version 0.9.0StatusaffectedConstraints<0.21.3
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| HashiCorp | Boundary | unaffected |
| ||||||
| HashiCorp | Boundary Enterprise | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
github.com/hashicorp/boundary
Go
Introduced 0 Fixed 0.19.5github.com/hashicorp/boundary
Go
Introduced 0.20.0 Fixed 0.20.3github.com/hashicorp/boundary
Go
Introduced 0.21.0 Fixed 0.21.3
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/hashicorp/boundary | 0 | 0.19.5 |
| Go | github.com/hashicorp/boundary | 0.20.0 | 0.20.3 |
| Go | github.com/hashicorp/boundary | 0.21.0 | 0.21.3 |
Remediation
No remediation recorded yet.
References (4)
- https://discuss.hashicorp.com/t/hcsec-2026-11-boundary-workers-vulnerable-to-denial-of-service-during-tls-handshake
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-27145 Advisory
- https://github.com/advisories/GHSA-7x9r-wcgg-w86f Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-7776
Change history (0)
No recorded changes yet.