CVE-2026-7776 json
Boundary Workers Vulnerable to Denial of Service During TLS Handshake
published 2026-05-04 6 mo ago modified 2026-10-26 13 d ago also GHSA-7x9r-wcgg-w86f , GO-2026-5237 , EUVD-2026-27145
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/hashicorp/boundary 0.19.5, 0.20.3, 0.21.3
- HashiCorp Boundary 0.19.5, 0.20.3, 0.21.3
- HashiCorp Boundary Enterprise 0.19.5, 0.20.3, 0.21.3
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/hashicorp/boundary | <0.19.5 >=0.20.0, <0.20.3 >=0.21.0, <0.21.3 |
0.19.5 0.20.3 0.21.3 |
Affected products
- HashiCorp Boundary
- HashiCorp Boundary Enterprise
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
Sources
- CVE List CVE-2026-7776
- GitHub Advisory GHSA-7x9r-wcgg-w86f
- NVD CVE-2026-7776
- OSV GO-2026-5237
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