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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (9.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.002 · change: -0.001
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.