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vuln-cve/data/2026/61xxx/CVE-2026-61891.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-61891",
"assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
"state": "PUBLISHED",
"assignerShortName": "eclipse",
"dateReserved": "2026-07-15T08:43:52.463Z",
"datePublished": "2026-08-05T11:03:01.669Z",
"dateUpdated": "2026-08-05T12:35:46.717Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
"shortName": "eclipse",
"dateUpdated": "2026-08-05T11:03:01.669Z"
},
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-22",
"description": "CWE-22",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-36",
"description": "CWE-36",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-200",
"description": "CWE-200",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-306",
"description": "CWE-306",
"type": "CWE"
}
]
}
],
"impacts": [
{
"capecId": "CAPEC-126",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-126"
}
]
},
{
"capecId": "CAPEC-597",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-597"
}
]
}
],
"affected": [
{
"vendor": "Eclipse Foundation",
"product": "Eclipse Theia",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.74.0",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
],
"descriptions": [
{
"lang": "en",
"value": "In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend exposes HTTP file-download endpoints (`GET /file`, `GET /files/`, `PUT /files/`) that convert a client-supplied URI directly to a filesystem path and stream the file, without confining it to the workspace or any allow-listed root. In browser (non-Electron) deployments the connection token is enforced only on WebSocket upgrades; the HTTP middleware in `@theia/core` re-issues the cookie and calls `next()` without rejecting tokenless HTTP requests, so these endpoints are reachable without a valid token. As a result an unauthenticated client can read any file readable by the backend process, including files outside the opened workspace (for example `/etc/hosts`, SSH keys, or tokens). Electron mode uses a separate `ElectronSecurityToken` and is not affected via this path.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "<p>In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend exposes HTTP file-download endpoints (`GET /file`, `GET /files/`, `PUT /files/`) that convert a client-supplied URI directly to a filesystem path and stream the file, without confining it to the workspace or any allow-listed root. In browser (non-Electron) deployments the connection token is enforced only on WebSocket upgrades; the HTTP middleware in `@theia/core` re-issues the cookie and calls `next()` without rejecting tokenless HTTP requests, so these endpoints are reachable without a valid token. As a result an unauthenticated client can read any file readable by the backend process, including files outside the opened workspace (for example `/etc/hosts`, SSH keys, or tokens). Electron mode uses a separate `ElectronSecurityToken` and is not affected via this path.</p>"
}
]
}
],
"references": [
{
"url": "https://github.com/eclipse-theia/theia/security/advisories/GHSA-qqc8-9538-25v4"
},
{
"url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/570"
},
{
"url": "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/176"
}
],
"metrics": [
{
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
],
"cvssV3_1": {
"version": "3.1",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "NONE",
"baseSeverity": "HIGH",
"baseScore": 7.5,
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
}
],
"credits": [
{
"lang": "en",
"value": "Christian Damus (http://github.com/cdamus, https://gitlab.eclipse.org/cdamus)",
"type": "finder"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.4"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-08-05T12:34:58.985421Z",
"id": "CVE-2026-61891",
"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": "2026-08-05T12:35:46.717Z"
}
}
]
}
}