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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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:99f9bd7918662e0af2d9366c33d71765e71d2da4582c959c2346ed1de2df95ec
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"product":"Boundary","repo":"https://github.com/hashicorp/boundary","vendor":"HashiCorp","versions":[{"changes":[{"at":"0.19.5","status":"unaffected"},{"at":"0.20.3","status":"unaffected"},{"at":"0.21.3","status":"unaffected"}],"lessThan":"0.21.3","status":"affected","version":"0.9.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8606174d5896f51974491411553ee32db88e158b3dc172600b45cd288e1a0d90 · sha256:2995f78abed989cf… · /containers/cna/affected/0

{"defaultStatus":"unaffected","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"product":"Boundary Enterprise","repo":"https://github.com/hashicorp/boundary","vendor":"HashiCorp","versions":[{"changes":[{"at":"0.19.5","status":"unaffected"},{"at":"0.20.3","status":"unaffected"},{"at":"0.21.3","status":"unaffected"}],"lessThan":"0.21.3","status":"affected","version":"0.9.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8606174d5896f51974491411553ee32db88e158b3dc172600b45cd288e1a0d90 · sha256:2995f78abed989cf… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"product":"Boundary","repo":"https://github.com/hashicorp/boundary","vendor":"HashiCorp","versions":[{"changes":[{"at":"0.19.5","status":"unaffected"},{"at":"0.20.3","status":"unaffected"},{"at":"0.21.3","status":"unaffected"}],"lessThan":"0.21.3","status":"affected","version":"0.9.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8606174d5896f51974491411553ee32db88e158b3dc172600b45cd288e1a0d90 · sha256:2995f78abed989cf… · /containers/cna/affected/0
{"defaultStatus":"unaffected","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"product":"Boundary Enterprise","repo":"https://github.com/hashicorp/boundary","vendor":"HashiCorp","versions":[{"changes":[{"at":"0.19.5","status":"unaffected"},{"at":"0.20.3","status":"unaffected"},{"at":"0.21.3","status":"unaffected"}],"lessThan":"0.21.3","status":"affected","version":"0.9.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8606174d5896f51974491411553ee32db88e158b3dc172600b45cd288e1a0d90 · sha256:2995f78abed989cf… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8606174d5896f51974491411553ee32db88e158b3dc172600b45cd288e1a0d90 · sha256:2995f78abed989cf… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8606174d5896f51974491411553ee32db88e158b3dc172600b45cd288e1a0d90 · sha256:2995f78abed989cf… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://discuss.hashicorp.com/t/hcsec-2026-11-boundary-workers-vulnerable-to-denial-of-service-during-tls-handshake"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8606174d5896f51974491411553ee32db88e158b3dc172600b45cd288e1a0d90 · sha256:2995f78abed989cf… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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