{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-12539", "assignerOrgId": "686469e6-3ff6-451b-ab8b-cf5b9e89401e", "state": "PUBLISHED", "assignerShortName": "Docker", "dateReserved": "2026-06-17T15:31:11.749Z", "datePublished": "2026-06-18T13:51:13.588Z", "dateUpdated": "2026-06-18T14:56:02.329Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "platforms": ["MacOS", "Linux", "Windows"], "product": "Docker Sandboxes", "vendor": "Docker", "versions": [{"version": "0.14.0", "status": "affected", "lessThan": "0.33.0", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Docker Sandboxes (sbx) blocks ICMP egress with an authorizer applied only at network-creation time, and does not re-apply it to networks rebuilt from disk when the Docker daemon restarts, so a restart-surviving sandbox forwards ICMP to arbitrary hosts. A workload inside a sandbox, which the threat model treats as untrusted, can therefore defeat the documented ICMP egress block to perform network reconnaissance and exfiltrate data over an ICMP covert channel, regardless of the configured allowlist."}], "value": "Docker Sandboxes (sbx) blocks ICMP egress with an authorizer applied only at network-creation time, and does not re-apply it to networks rebuilt from disk when the Docker daemon restarts, so a restart-surviving sandbox forwards ICMP to arbitrary hosts. A workload inside a sandbox, which the threat model treats as untrusted, can therefore defeat the documented ICMP egress block to perform network reconnaissance and exfiltrate data over an ICMP covert channel, regardless of the configured allowlist."}], "impacts": [{"capecId": "CAPEC-554", "descriptions": [{"lang": "en", "value": "CAPEC-554 Functionality Bypass"}]}], "metrics": [{"cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "baseScore": 5.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-923", "description": "CWE-923: Improper Restriction of Communication Channel to Intended Endpoints", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-665", "description": "CWE-665: Improper Initialization", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "686469e6-3ff6-451b-ab8b-cf5b9e89401e", "shortName": "Docker", "dateUpdated": "2026-06-18T13:54:16.307Z"}, "references": [{"tags": ["product"], "url": "https://docs.docker.com/ai/sandboxes/"}, {"tags": ["release-notes"], "url": "https://github.com/docker/sbx-releases/releases/tag/v0.33.0"}], "source": {"discovery": "INTERNAL"}, "title": "Docker Sandboxes ICMP egress restriction bypass after daemon restart"}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-18T14:54:40.780021Z", "id": "CVE-2026-12539", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"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": "2026-06-18T14:56:02.329Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-12539", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-18T14:54:40.780021Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-18T14:55:59.351Z"}}], "cna": {"title": "Docker Sandboxes ICMP egress restriction bypass after daemon restart", "source": {"discovery": "INTERNAL"}, "impacts": [{"capecId": "CAPEC-554", "descriptions": [{"lang": "en", "value": "CAPEC-554 Functionality Bypass"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.7, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Docker", "product": "Docker Sandboxes", "versions": [{"status": "affected", "version": "0.14.0", "lessThan": "0.33.0", "versionType": "semver"}], "platforms": ["MacOS", "Linux", "Windows"], "defaultStatus": "unaffected"}], "references": [{"url": "https://docs.docker.com/ai/sandboxes/", "tags": ["product"]}, {"url": "https://github.com/docker/sbx-releases/releases/tag/v0.33.0", "tags": ["release-notes"]}], "descriptions": [{"lang": "en", "value": "Docker Sandboxes (sbx) blocks ICMP egress with an authorizer applied only at network-creation time, and does not re-apply it to networks rebuilt from disk when the Docker daemon restarts, so a restart-surviving sandbox forwards ICMP to arbitrary hosts. A workload inside a sandbox, which the threat model treats as untrusted, can therefore defeat the documented ICMP egress block to perform network reconnaissance and exfiltrate data over an ICMP covert channel, regardless of the configured allowlist.", "supportingMedia": [{"type": "text/html", "value": "Docker Sandboxes (sbx) blocks ICMP egress with an authorizer applied only at network-creation time, and does not re-apply it to networks rebuilt from disk when the Docker daemon restarts, so a restart-surviving sandbox forwards ICMP to arbitrary hosts. A workload inside a sandbox, which the threat model treats as untrusted, can therefore defeat the documented ICMP egress block to perform network reconnaissance and exfiltrate data over an ICMP covert channel, regardless of the configured allowlist.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-923", "description": "CWE-923: Improper Restriction of Communication Channel to Intended Endpoints"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-665", "description": "CWE-665: Improper Initialization"}]}], "providerMetadata": {"orgId": "686469e6-3ff6-451b-ab8b-cf5b9e89401e", "shortName": "Docker", "dateUpdated": "2026-06-18T13:54:16.307Z"}}}, "cveMetadata": {"cveId": "CVE-2026-12539", "state": "PUBLISHED", "dateUpdated": "2026-06-18T14:56:02.329Z", "dateReserved": "2026-06-17T15:31:11.749Z", "assignerOrgId": "686469e6-3ff6-451b-ab8b-cf5b9e89401e", "datePublished": "2026-06-18T13:51:13.588Z", "assignerShortName": "Docker"}, "dataVersion": "5.2"}

{}

{}

{"created": "2026-06-18T18:15:02.151922+00:00", "updated": "2026-06-18T18:15:02.151928+00:00", "vendors": []}