CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-61891

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.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.005

EPSS Ranking 38.1%

CVSS Severity

CVSS v3 Score 7.5

References

Products affected by CVE-2026-61891

Eclipse » Theia » Version: N/A

cpe:2.3:a:eclipse:theia:-
Eclipse » Theia » Version: 0.0.1

cpe:2.3:a:eclipse:theia:0.0.1
Eclipse » Theia » Version: 0.1.0

cpe:2.3:a:eclipse:theia:0.1.0
Eclipse » Theia » Version: 0.1.1

cpe:2.3:a:eclipse:theia:0.1.1
Eclipse » Theia » Version: 0.10.0

cpe:2.3:a:eclipse:theia:0.10.0
Eclipse » Theia » Version: 0.11.0

cpe:2.3:a:eclipse:theia:0.11.0
Eclipse » Theia » Version: 0.12.0

cpe:2.3:a:eclipse:theia:0.12.0
Eclipse » Theia » Version: 0.13.0

cpe:2.3:a:eclipse:theia:0.13.0
Eclipse » Theia » Version: 0.14.0

cpe:2.3:a:eclipse:theia:0.14.0
Eclipse » Theia » Version: 0.15.0

cpe:2.3:a:eclipse:theia:0.15.0
Eclipse » Theia » Version: 0.16.0

cpe:2.3:a:eclipse:theia:0.16.0
Eclipse » Theia » Version: 0.16.1

cpe:2.3:a:eclipse:theia:0.16.1
Eclipse » Theia » Version: 0.2.0

cpe:2.3:a:eclipse:theia:0.2.0
Eclipse » Theia » Version: 0.2.1

cpe:2.3:a:eclipse:theia:0.2.1
Eclipse » Theia » Version: 0.2.2

cpe:2.3:a:eclipse:theia:0.2.2
Eclipse » Theia » Version: 0.2.3

cpe:2.3:a:eclipse:theia:0.2.3
Eclipse » Theia » Version: 0.2.4

cpe:2.3:a:eclipse:theia:0.2.4
Eclipse » Theia » Version: 0.3.0

cpe:2.3:a:eclipse:theia:0.3.0
Eclipse » Theia » Version: 0.3.1

cpe:2.3:a:eclipse:theia:0.3.1
Eclipse » Theia » Version: 0.3.10

cpe:2.3:a:eclipse:theia:0.3.10
Eclipse » Theia » Version: 0.3.11

cpe:2.3:a:eclipse:theia:0.3.11
Eclipse » Theia » Version: 0.3.12

cpe:2.3:a:eclipse:theia:0.3.12
Eclipse » Theia » Version: 0.3.13

cpe:2.3:a:eclipse:theia:0.3.13
Eclipse » Theia » Version: 0.3.14

cpe:2.3:a:eclipse:theia:0.3.14
Eclipse » Theia » Version: 0.3.15

cpe:2.3:a:eclipse:theia:0.3.15
Eclipse » Theia » Version: 0.3.16

cpe:2.3:a:eclipse:theia:0.3.16
Eclipse » Theia » Version: 0.3.17

cpe:2.3:a:eclipse:theia:0.3.17
Eclipse » Theia » Version: 0.3.18

cpe:2.3:a:eclipse:theia:0.3.18
Eclipse » Theia » Version: 0.3.19

cpe:2.3:a:eclipse:theia:0.3.19
Eclipse » Theia » Version: 0.3.2

cpe:2.3:a:eclipse:theia:0.3.2
Eclipse » Theia » Version: 0.3.3

cpe:2.3:a:eclipse:theia:0.3.3
Eclipse » Theia » Version: 0.3.4

cpe:2.3:a:eclipse:theia:0.3.4
Eclipse » Theia » Version: 0.3.6

cpe:2.3:a:eclipse:theia:0.3.6
Eclipse » Theia » Version: 0.3.7

cpe:2.3:a:eclipse:theia:0.3.7
Eclipse » Theia » Version: 0.3.8

cpe:2.3:a:eclipse:theia:0.3.8
Eclipse » Theia » Version: 0.3.9

cpe:2.3:a:eclipse:theia:0.3.9
Eclipse » Theia » Version: 0.4.0

cpe:2.3:a:eclipse:theia:0.4.0
Eclipse » Theia » Version: 0.5.0

cpe:2.3:a:eclipse:theia:0.5.0
Eclipse » Theia » Version: 0.6.0

cpe:2.3:a:eclipse:theia:0.6.0
Eclipse » Theia » Version: 0.6.1

cpe:2.3:a:eclipse:theia:0.6.1
Eclipse » Theia » Version: 0.7.0

cpe:2.3:a:eclipse:theia:0.7.0
Eclipse » Theia » Version: 0.7.1

cpe:2.3:a:eclipse:theia:0.7.1
Eclipse » Theia » Version: 0.7.2

cpe:2.3:a:eclipse:theia:0.7.2
Eclipse » Theia » Version: 0.8.0

cpe:2.3:a:eclipse:theia:0.8.0
Eclipse » Theia » Version: 0.9.0

cpe:2.3:a:eclipse:theia:0.9.0
Eclipse » Theia » Version: 1.1.0

cpe:2.3:a:eclipse:theia:1.1.0
Eclipse » Theia » Version: 1.10.0

cpe:2.3:a:eclipse:theia:1.10.0
Eclipse » Theia » Version: 1.11.0

cpe:2.3:a:eclipse:theia:1.11.0
Eclipse » Theia » Version: 1.12.0

cpe:2.3:a:eclipse:theia:1.12.0
Eclipse » Theia » Version: 1.12.1

cpe:2.3:a:eclipse:theia:1.12.1
Eclipse » Theia » Version: 1.14.0

cpe:2.3:a:eclipse:theia:1.14.0
Eclipse » Theia » Version: 1.15.0

cpe:2.3:a:eclipse:theia:1.15.0
Eclipse » Theia » Version: 1.16.0

cpe:2.3:a:eclipse:theia:1.16.0
Eclipse » Theia » Version: 1.17.0

cpe:2.3:a:eclipse:theia:1.17.0
Eclipse » Theia » Version: 1.17.1

cpe:2.3:a:eclipse:theia:1.17.1
Eclipse » Theia » Version: 1.17.2

cpe:2.3:a:eclipse:theia:1.17.2
Eclipse » Theia » Version: 1.18.0

cpe:2.3:a:eclipse:theia:1.18.0
Eclipse » Theia » Version: 1.19.0

cpe:2.3:a:eclipse:theia:1.19.0
Eclipse » Theia » Version: 1.2.0

cpe:2.3:a:eclipse:theia:1.2.0
Eclipse » Theia » Version: 1.20.0

cpe:2.3:a:eclipse:theia:1.20.0
Eclipse » Theia » Version: 1.21.0

cpe:2.3:a:eclipse:theia:1.21.0
Eclipse » Theia » Version: 1.22.0

cpe:2.3:a:eclipse:theia:1.22.0
Eclipse » Theia » Version: 1.22.1

cpe:2.3:a:eclipse:theia:1.22.1
Eclipse » Theia » Version: 1.23.0

cpe:2.3:a:eclipse:theia:1.23.0
Eclipse » Theia » Version: 1.24.0

cpe:2.3:a:eclipse:theia:1.24.0
Eclipse » Theia » Version: 1.25.0

cpe:2.3:a:eclipse:theia:1.25.0
Eclipse » Theia » Version: 1.26.0

cpe:2.3:a:eclipse:theia:1.26.0
Eclipse » Theia » Version: 1.27.0

cpe:2.3:a:eclipse:theia:1.27.0
Eclipse » Theia » Version: 1.28.0

cpe:2.3:a:eclipse:theia:1.28.0
Eclipse » Theia » Version: 1.29.0

cpe:2.3:a:eclipse:theia:1.29.0
Eclipse » Theia » Version: 1.29.1

cpe:2.3:a:eclipse:theia:1.29.1
Eclipse » Theia » Version: 1.29.2

cpe:2.3:a:eclipse:theia:1.29.2
Eclipse » Theia » Version: 1.3.0

cpe:2.3:a:eclipse:theia:1.3.0
Eclipse » Theia » Version: 1.30.0

cpe:2.3:a:eclipse:theia:1.30.0
Eclipse » Theia » Version: 1.31.0

cpe:2.3:a:eclipse:theia:1.31.0
Eclipse » Theia » Version: 1.31.1

cpe:2.3:a:eclipse:theia:1.31.1
Eclipse » Theia » Version: 1.32.0

cpe:2.3:a:eclipse:theia:1.32.0
Eclipse » Theia » Version: 1.33.0

cpe:2.3:a:eclipse:theia:1.33.0
Eclipse » Theia » Version: 1.34.0

cpe:2.3:a:eclipse:theia:1.34.0
Eclipse » Theia » Version: 1.34.1

cpe:2.3:a:eclipse:theia:1.34.1
Eclipse » Theia » Version: 1.34.2

cpe:2.3:a:eclipse:theia:1.34.2
Eclipse » Theia » Version: 1.34.3

cpe:2.3:a:eclipse:theia:1.34.3
Eclipse » Theia » Version: 1.34.4

cpe:2.3:a:eclipse:theia:1.34.4
Eclipse » Theia » Version: 1.35.0

cpe:2.3:a:eclipse:theia:1.35.0
Eclipse » Theia » Version: 1.36.0

cpe:2.3:a:eclipse:theia:1.36.0
Eclipse » Theia » Version: 1.37.0

cpe:2.3:a:eclipse:theia:1.37.0
Eclipse » Theia » Version: 1.37.1

cpe:2.3:a:eclipse:theia:1.37.1
Eclipse » Theia » Version: 1.37.2

cpe:2.3:a:eclipse:theia:1.37.2
Eclipse » Theia » Version: 1.38.0

cpe:2.3:a:eclipse:theia:1.38.0
Eclipse » Theia » Version: 1.39.0

cpe:2.3:a:eclipse:theia:1.39.0
Eclipse » Theia » Version: 1.4.0

cpe:2.3:a:eclipse:theia:1.4.0
Eclipse » Theia » Version: 1.40.0

cpe:2.3:a:eclipse:theia:1.40.0
Eclipse » Theia » Version: 1.40.1

cpe:2.3:a:eclipse:theia:1.40.1
Eclipse » Theia » Version: 1.41.0

cpe:2.3:a:eclipse:theia:1.41.0
Eclipse » Theia » Version: 1.42.0

cpe:2.3:a:eclipse:theia:1.42.0
Eclipse » Theia » Version: 1.42.1

cpe:2.3:a:eclipse:theia:1.42.1
Eclipse » Theia » Version: 1.43.0

cpe:2.3:a:eclipse:theia:1.43.0
Eclipse » Theia » Version: 1.43.1

cpe:2.3:a:eclipse:theia:1.43.1
Eclipse » Theia » Version: 1.44.0

cpe:2.3:a:eclipse:theia:1.44.0
Eclipse » Theia » Version: 1.45.0

cpe:2.3:a:eclipse:theia:1.45.0
Eclipse » Theia » Version: 1.45.1

cpe:2.3:a:eclipse:theia:1.45.1
Eclipse » Theia » Version: 1.46.0

cpe:2.3:a:eclipse:theia:1.46.0
Eclipse » Theia » Version: 1.46.1

cpe:2.3:a:eclipse:theia:1.46.1
Eclipse » Theia » Version: 1.46.101

cpe:2.3:a:eclipse:theia:1.46.101
Eclipse » Theia » Version: 1.47.0

cpe:2.3:a:eclipse:theia:1.47.0
Eclipse » Theia » Version: 1.47.1

cpe:2.3:a:eclipse:theia:1.47.1
Eclipse » Theia » Version: 1.48.0

cpe:2.3:a:eclipse:theia:1.48.0
Eclipse » Theia » Version: 1.48.2

cpe:2.3:a:eclipse:theia:1.48.2
Eclipse » Theia » Version: 1.48.3

cpe:2.3:a:eclipse:theia:1.48.3
Eclipse » Theia » Version: 1.49.0

cpe:2.3:a:eclipse:theia:1.49.0
Eclipse » Theia » Version: 1.49.1

cpe:2.3:a:eclipse:theia:1.49.1
Eclipse » Theia » Version: 1.5.0

cpe:2.3:a:eclipse:theia:1.5.0
Eclipse » Theia » Version: 1.50.0

cpe:2.3:a:eclipse:theia:1.50.0
Eclipse » Theia » Version: 1.50.1

cpe:2.3:a:eclipse:theia:1.50.1
Eclipse » Theia » Version: 1.51.0

cpe:2.3:a:eclipse:theia:1.51.0
Eclipse » Theia » Version: 1.52.0

cpe:2.3:a:eclipse:theia:1.52.0
Eclipse » Theia » Version: 1.53.0

cpe:2.3:a:eclipse:theia:1.53.0
Eclipse » Theia » Version: 1.53.1

cpe:2.3:a:eclipse:theia:1.53.1
Eclipse » Theia » Version: 1.53.2

cpe:2.3:a:eclipse:theia:1.53.2
Eclipse » Theia » Version: 1.54.0

cpe:2.3:a:eclipse:theia:1.54.0
Eclipse » Theia » Version: 1.55.0

cpe:2.3:a:eclipse:theia:1.55.0
Eclipse » Theia » Version: 1.55.1

cpe:2.3:a:eclipse:theia:1.55.1
Eclipse » Theia » Version: 1.56.0

cpe:2.3:a:eclipse:theia:1.56.0
Eclipse » Theia » Version: 1.57.0

cpe:2.3:a:eclipse:theia:1.57.0
Eclipse » Theia » Version: 1.57.1

cpe:2.3:a:eclipse:theia:1.57.1
Eclipse » Theia » Version: 1.58.0

cpe:2.3:a:eclipse:theia:1.58.0
Eclipse » Theia » Version: 1.58.1

cpe:2.3:a:eclipse:theia:1.58.1
Eclipse » Theia » Version: 1.58.3

cpe:2.3:a:eclipse:theia:1.58.3
Eclipse » Theia » Version: 1.58.4

cpe:2.3:a:eclipse:theia:1.58.4
Eclipse » Theia » Version: 1.58.5

cpe:2.3:a:eclipse:theia:1.58.5
Eclipse » Theia » Version: 1.59.0

cpe:2.3:a:eclipse:theia:1.59.0
Eclipse » Theia » Version: 1.6.0

cpe:2.3:a:eclipse:theia:1.6.0
Eclipse » Theia » Version: 1.60.0

cpe:2.3:a:eclipse:theia:1.60.0
Eclipse » Theia » Version: 1.60.1

cpe:2.3:a:eclipse:theia:1.60.1
Eclipse » Theia » Version: 1.60.2

cpe:2.3:a:eclipse:theia:1.60.2
Eclipse » Theia » Version: 1.61.0

cpe:2.3:a:eclipse:theia:1.61.0
Eclipse » Theia » Version: 1.61.1

cpe:2.3:a:eclipse:theia:1.61.1
Eclipse » Theia » Version: 1.62.0

cpe:2.3:a:eclipse:theia:1.62.0
Eclipse » Theia » Version: 1.62.1

cpe:2.3:a:eclipse:theia:1.62.1
Eclipse » Theia » Version: 1.62.2

cpe:2.3:a:eclipse:theia:1.62.2
Eclipse » Theia » Version: 1.63.0

cpe:2.3:a:eclipse:theia:1.63.0
Eclipse » Theia » Version: 1.63.1

cpe:2.3:a:eclipse:theia:1.63.1
Eclipse » Theia » Version: 1.63.2

cpe:2.3:a:eclipse:theia:1.63.2
Eclipse » Theia » Version: 1.63.3

cpe:2.3:a:eclipse:theia:1.63.3
Eclipse » Theia » Version: 1.64.0

cpe:2.3:a:eclipse:theia:1.64.0
Eclipse » Theia » Version: 1.64.1

cpe:2.3:a:eclipse:theia:1.64.1
Eclipse » Theia » Version: 1.64.2

cpe:2.3:a:eclipse:theia:1.64.2
Eclipse » Theia » Version: 1.64.3

cpe:2.3:a:eclipse:theia:1.64.3
Eclipse » Theia » Version: 1.64.4

cpe:2.3:a:eclipse:theia:1.64.4
Eclipse » Theia » Version: 1.65.0

cpe:2.3:a:eclipse:theia:1.65.0
Eclipse » Theia » Version: 1.65.1

cpe:2.3:a:eclipse:theia:1.65.1
Eclipse » Theia » Version: 1.65.2

cpe:2.3:a:eclipse:theia:1.65.2
Eclipse » Theia » Version: 1.66.0

cpe:2.3:a:eclipse:theia:1.66.0
Eclipse » Theia » Version: 1.66.1

cpe:2.3:a:eclipse:theia:1.66.1
Eclipse » Theia » Version: 1.66.2

cpe:2.3:a:eclipse:theia:1.66.2
Eclipse » Theia » Version: 1.67.0

cpe:2.3:a:eclipse:theia:1.67.0
Eclipse » Theia » Version: 1.68.0

cpe:2.3:a:eclipse:theia:1.68.0
Eclipse » Theia » Version: 1.68.1

cpe:2.3:a:eclipse:theia:1.68.1
Eclipse » Theia » Version: 1.68.2

cpe:2.3:a:eclipse:theia:1.68.2
Eclipse » Theia » Version: 1.69.0

cpe:2.3:a:eclipse:theia:1.69.0
Eclipse » Theia » Version: 1.7.0

cpe:2.3:a:eclipse:theia:1.7.0
Eclipse » Theia » Version: 1.70.0

cpe:2.3:a:eclipse:theia:1.70.0
Eclipse » Theia » Version: 1.70.1

cpe:2.3:a:eclipse:theia:1.70.1
Eclipse » Theia » Version: 1.70.2

cpe:2.3:a:eclipse:theia:1.70.2
Eclipse » Theia » Version: 1.71.0

cpe:2.3:a:eclipse:theia:1.71.0
Eclipse » Theia » Version: 1.71.1

cpe:2.3:a:eclipse:theia:1.71.1
Eclipse » Theia » Version: 1.71.2

cpe:2.3:a:eclipse:theia:1.71.2
Eclipse » Theia » Version: 1.72.0

cpe:2.3:a:eclipse:theia:1.72.0
Eclipse » Theia » Version: 1.72.1

cpe:2.3:a:eclipse:theia:1.72.1
Eclipse » Theia » Version: 1.72.2

cpe:2.3:a:eclipse:theia:1.72.2
Eclipse » Theia » Version: 1.72.3

cpe:2.3:a:eclipse:theia:1.72.3
Eclipse » Theia » Version: 1.73.0

cpe:2.3:a:eclipse:theia:1.73.0
Eclipse » Theia » Version: 1.73.1

cpe:2.3:a:eclipse:theia:1.73.1
Eclipse » Theia » Version: 1.8.0

cpe:2.3:a:eclipse:theia:1.8.0
Eclipse » Theia » Version: 1.8.1

cpe:2.3:a:eclipse:theia:1.8.1
Eclipse » Theia » Version: 1.9.0

cpe:2.3:a:eclipse:theia:1.9.0

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-61891

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