CVE-2026-7776: Boundary Workers Vulnerable to Denial of Service During TLS Handshake
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 Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-7776?
CVE-2026-7776 is classified as a high severity vulnerability due to its potential to cause a denial-of-service condition.
How do I fix CVE-2026-7776?
To fix CVE-2026-7776, upgrade HashiCorp Boundary to version 0.21.4 or later.
Which versions of HashiCorp Boundary are affected by CVE-2026-7776?
CVE-2026-7776 affects HashiCorp Boundary versions up to and including 0.21.3, 0.20.3, and 0.19.5.
What type of attack does CVE-2026-7776 involve?
CVE-2026-7776 involves a denial-of-service attack during TLS handshake processes, affecting worker nodes.
Who is impacted by CVE-2026-7776?
Users of HashiCorp Boundary who are operating affected versions are at risk of experiencing denial-of-service conditions.