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Vulnerability record · CVE-2019-17636 · published 10 March 2020

CVE-2019-17636: Eclipse theia insufficient verification of data authenticity vulnerability

Eclipse · Theia

In Eclipse Theia versions 0.3.9 through 0.15.0, one of the default pre-packaged Theia extensions is "Mini-Browser", published as "@theia/mini-browser" on npmjs.com. This extension, for its own needs, exposes a HTTP endpoint that allows to read the content of files on the host's filesystem, given their path, without restrictions on the requester's origin. This design is vulnerable to being exploited remotely through a DNS rebinding attack or a drive-by download of a carefully crafted exploit.

8.1 CVSS 3.1 High EPSS 0.60% · top 53.4% CWE-345 · Insufficient verification of data authenticity
8.1CVSS 3.1 base score, v2 5.8
0.60%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In Eclipse Theia versions 0.3.9 through 0.15.0, one of the default pre-packaged Theia extensions is "Mini-Browser", published as "@theia/mini-browser" on npmjs.com. This extension, for its own needs, exposes a HTTP endpoint that allows to read the content of files on the host's filesystem, given their path, without restrictions on the requester's origin. This design is vulnerable to being exploited remotely through a DNS rebinding attack or a drive-by download of a carefully crafted exploit.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugs.eclipse.org/bugs/show_bug.cgi?id=551747 ExploitIssue TrackingVendor Advisory
https://bugs.eclipse.org/bugs/show_bug.cgi?id=551747 ExploitIssue TrackingVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-34436Eclipse theia path traversal vulnerabilityIn Eclipse Theia 0.1.1 to 0.2.0, it is possible to exploit the default build to obtain remote code execution (and XXE) via the theia-xml-extension. T…EPSS 2.2%9.6CVE-2020-27224Eclipse theia cross-site scripting vulnerabilityIn Eclipse Theia versions up to and including 1.2.0, the Markdown Preview (@theia/preview), can be exploited to execute arbitrary code.EPSS 2.6%8.8CVE-2026-60009Eclipse theia path traversal vulnerabilityIn Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend binds `POST /file-upload` in every filesystem-enabled deploymen…EPSS 0.44%8.8CVE-2021-34435Eclipse theia origin validation error vulnerabilityIn Eclipse Theia 0.3.9 to 1.8.1, the "mini-browser" extension allows a user to preview HTML files in an iframe inside the IDE. But with the way it is…EPSS 0.60%8.4CVE-2026-44691Eclipse theia inclusion from untrusted sphere vulnerabilityIn Eclipse Theia versions prior to 1.69.0, custom task definitions in workspace files (e.g. .theia/tasks.json, .vscode/tasks.json) could be executed …EPSS 0.41%8.4CVE-2026-46580Eclipse theia inclusion from untrusted sphere vulnerabilityIn Eclipse Theia versions prior to 1.71.0, files matching the pattern .prompts/*.prompttemplate in a workspace were automatically loaded and could ov…EPSS 0.51%8.4CVE-2026-44688Eclipse theia inclusion from untrusted sphere vulnerabilityIn Eclipse Theia versions prior to 1.71.0, the AI chat agent processed workspace file and directory names as part of its prompt context without disti…EPSS 0.51%7.5CVE-2026-61891Eclipse theia path traversal vulnerabilityIn Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend exposes HTTP file-download endpoints (`GET /file`, `GET /files/…EPSS 0.53%

Source: NIST National Vulnerability Database (record CVE-2019-17636), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.