{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-7776", "assignerOrgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc", "state": "PUBLISHED", "assignerShortName": "HashiCorp", "dateReserved": "2026-05-04T15:10:16.232Z", "datePublished": "2026-05-04T21:34:10.975Z", "dateUpdated": "2026-05-05T14:14:05.799Z"}, "containers": {"cna": {"affected": [{"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"}]}, {"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"}]}], "credits": [{"lang": "en", "value": "This issue was identified by the Boundary Engineering team."}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Boundary Community Edition and Boundary Enterprise (\u201cBoundary\u201d) 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.</p><br/>"}], "value": "Boundary Community Edition and Boundary Enterprise (\u201cBoundary\u201d) 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."}], "impacts": [{"capecId": "CAPEC-227", "descriptions": [{"lang": "en", "value": "CAPEC-227: Sustained Client Engagement"}]}], "metrics": [{"cvssV3_1": {"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"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc", "shortName": "HashiCorp", "dateUpdated": "2026-05-04T21:36:18.758Z"}, "references": [{"url": "https://discuss.hashicorp.com/t/hcsec-2026-11-boundary-workers-vulnerable-to-denial-of-service-during-tls-handshake"}], "source": {"advisory": "HCSEC-2026-11", "discovery": "INTERNAL"}, "title": "Boundary Workers Vulnerable to Denial of Service During TLS Handshake"}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-05T13:20:57.356797Z", "id": "CVE-2026-7776", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-05T14:14:05.799Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-7776", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-05T13:20:57.356797Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-05T13:21:01.342Z"}}], "cna": {"title": "Boundary Workers Vulnerable to Denial of Service During TLS Handshake", "source": {"advisory": "HCSEC-2026-11", "discovery": "INTERNAL"}, "credits": [{"lang": "en", "value": "This issue was identified by the Boundary Engineering team."}], "impacts": [{"capecId": "CAPEC-227", "descriptions": [{"lang": "en", "value": "CAPEC-227: Sustained Client Engagement"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "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"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/hashicorp/boundary", "vendor": "HashiCorp", "product": "Boundary", "versions": [{"status": "affected", "changes": [{"at": "0.19.5", "status": "unaffected"}, {"at": "0.20.3", "status": "unaffected"}, {"at": "0.21.3", "status": "unaffected"}], "version": "0.9.0", "lessThan": "0.21.3", "versionType": "semver"}], "platforms": ["64 bit", "32 bit", "x86", "ARM", "MacOS", "Windows", "Linux"], "defaultStatus": "unaffected"}, {"repo": "https://github.com/hashicorp/boundary", "vendor": "HashiCorp", "product": "Boundary Enterprise", "versions": [{"status": "affected", "changes": [{"at": "0.19.5", "status": "unaffected"}, {"at": "0.20.3", "status": "unaffected"}, {"at": "0.21.3", "status": "unaffected"}], "version": "0.9.0", "lessThan": "0.21.3", "versionType": "semver"}], "platforms": ["64 bit", "32 bit", "x86", "ARM", "MacOS", "Windows", "Linux"], "defaultStatus": "unaffected"}], "references": [{"url": "https://discuss.hashicorp.com/t/hcsec-2026-11-boundary-workers-vulnerable-to-denial-of-service-during-tls-handshake"}], "descriptions": [{"lang": "en", "value": "Boundary Community Edition and Boundary Enterprise (\u201cBoundary\u201d) 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.", "supportingMedia": [{"type": "text/html", "value": "<p>Boundary Community Edition and Boundary Enterprise (\u201cBoundary\u201d) 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.</p><br/>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-770", "description": "CWE-770: Allocation of Resources Without Limits or Throttling"}]}], "providerMetadata": {"orgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc", "shortName": "HashiCorp", "dateUpdated": "2026-05-04T21:36:18.758Z"}}}, "cveMetadata": {"cveId": "CVE-2026-7776", "state": "PUBLISHED", "dateUpdated": "2026-05-05T14:14:05.799Z", "dateReserved": "2026-05-04T15:10:16.232Z", "assignerOrgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc", "datePublished": "2026-05-04T21:34:10.975Z", "assignerShortName": "HashiCorp"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Boundary Community Edition and Boundary Enterprise (\u201cBoundary\u201d) 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."}], "id": "CVE-2026-7776", "lastModified": "2026-05-05T20:24:04.853", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security@hashicorp.com", "type": "Secondary"}]}, "published": "2026-05-04T22:16:20.330", "references": [{"source": "security@hashicorp.com", "url": "https://discuss.hashicorp.com/t/hcsec-2026-11-boundary-workers-vulnerable-to-denial-of-service-during-tls-handshake"}], "sourceIdentifier": "security@hashicorp.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security@hashicorp.com", "type": "Secondary"}]}

{}