Resource exhaustion in Hashicorp Boundary
CVE-2026-7776
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.
EPSS: 0.002 (9.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Hashicorp Boundary — versions 0.9.0
- Hashicorp Boundary Enterprise — versions 0.9.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-7776?
- CVE-2026-7776 is a high-severity vulnerability in Hashicorp Boundary, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-05-04.
- How severe is CVE-2026-7776?
- High severity. CVSS v3 base score is 7.5 out of 10.