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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-10054",
        "assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
        "state": "PUBLISHED",
        "assignerShortName": "eclipse",
        "dateReserved": "2026-05-29T07:35:37.279Z",
        "datePublished": "2026-07-03T10:11:32.446Z",
        "dateUpdated": "2026-07-07T03:56:07.775Z"
    },
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        "cna": {
            "providerMetadata": {
                "orgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
                "shortName": "eclipse",
                "dateUpdated": "2026-07-03T10:11:32.446Z"
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-1385",
                            "description": "CWE-1385 Missing origin validation in WebSockets",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-306",
                            "description": "CWE-306 Missing authentication for critical function",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-111",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-111 JSON Hijacking (aka JavaScript Hijacking)"
                        }
                    ]
                },
                {
                    "capecId": "CAPEC-62",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-62 Cross Site Request Forgery"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Eclipse Foundation",
                    "product": "Eclipse Theia",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "1.8.1",
                            "lessThan": "1.73.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In affected versions of Eclipse Theia (1.8.1 and later), the browser backend exposes privileged terminal RPC over WebSocket (/services/shell-terminal, /services/terminals/:id) without service-level authentication.\n\n\n\n\nWebSocket origin validation in @theia/core is fail-open: connections are accepted when the Origin header is missing or when no THEIA_HOSTS allowlist is configured (the default). The Socket.IO integration additionally replaces the real Origin header with a client-supplied fix-origin header that an attacker can control or omit.\n\n\n\n\nAs a result, a foreign-origin web page visited by a user with a running Theia instance can open the /services WebSocket namespace, invoke terminal creation, attach to the resulting terminal data channel, execute arbitrary OS commands, and read their output. This affects both local developer setups (drive-by attack) and hosted or tunneled deployments without strong external authentication.\n\n\n\n\nA fix is in development that enforces same-origin validation by default, removes trust in the fix-origin header, gates HTTP and WebSocket access on a SameSite=Strict; HttpOnly connection-token cookie, and sanitizes shell terminal creation options.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<p>In affected versions of Eclipse Theia (1.8.1 and later), the browser backend exposes privileged terminal RPC over WebSocket (<code>/services/shell-terminal</code>, <code>/services/terminals/:id</code>) without service-level authentication.</p>\n<p>WebSocket origin validation in <code>@theia/core</code> is fail-open: connections are accepted when the <code>Origin</code> header is missing or when no <code>THEIA_HOSTS</code> allowlist is configured (the default). The Socket.IO integration additionally replaces the real <code>Origin</code> header with a client-supplied <code>fix-origin</code> header that an attacker can control or omit.</p>\n<p>As a result, a foreign-origin web page visited by a user with a running Theia instance can open the <code>/services</code> WebSocket namespace, invoke terminal creation, attach to the resulting terminal data channel, execute arbitrary OS commands, and read their output. This affects both local developer setups (drive-by attack) and hosted or tunneled deployments without strong external authentication.</p>\n<p>A fix is in development that enforces same-origin validation by default, removes trust in the <code>fix-origin</code> header, gates HTTP and WebSocket access on a <code>SameSite=Strict; HttpOnly</code> connection-token cookie, and sanitizes shell terminal creation options.</p>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://github.com/eclipse-theia/theia/security/advisories/GHSA-78g8-vm3p-97c6"
                },
                {
                    "url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/376"
                }
            ],
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                            "value": "GENERAL"
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                    "cvssV3_1": {
                        "version": "3.1",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "REQUIRED",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "HIGH",
                        "baseSeverity": "HIGH",
                        "baseScore": 8.8,
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
                    }
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Anwar Ayoob",
                    "type": "reporter"
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            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "x_generator": {
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        "adp": [
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                "metrics": [
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                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-06T00:00:00+00:00",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
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                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3",
                                "id": "CVE-2026-10054"
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                "title": "CISA ADP Vulnrichment",
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