Insufficient verification of data authenticity in Eclipse Theia
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-345.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse Theia | 0.3.9 to 0.15.0 | — | No fix listed | CNA |
| — | @theia/mini-browser (npm) | 0.3.9 to before 0.16.0 | 0.16.0 | Patch available | GHSA-f7vx-j8mp-3h2x |
- Eclipse Theia VendorEclipse Foundation Affected 0.3.9 to 0.15.0 Fixed in — No fix listed CNA
- @theia/mini-browser (npm) Vendor— Affected 0.3.9 to before 0.16.0 Fixed in 0.16.0 Patch available GHSA-f7vx-j8mp-3h2x
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:* | 0.3.9 – 0.15.0 | Vulnerable | Eclipse Foundation |
- cpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:* Versions 0.3.9 – 0.15.0 Vulnerable ·Eclipse Foundation
Remediation
- Fix · GHSA-f7vx-j8mp-3h2x @theia/mini-browser (npm) Fixed in 0.16.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2019-17636
- 2026-10-03 Alias added: GHSA-f7vx-j8mp-3h2x
References
More Eclipse Foundation Theia vulnerabilities
- TI-2026-12294 Prototype pollution in Eclipse Theia CVSS 4.0MEDIUM 5.7
- TI-2021-13470 Path traversal in Eclipse Theia CVSS 3.1CRITICAL 9.8
- TI-2020-16550 Cross-site scripting in Eclipse Theia CVSS 3.1CRITICAL 9.6
- TI-2026-10807 Path traversal in Eclipse Theia CVSS 3.1HIGH 7.5
- TI-2026-44283 Information disclosure in Eclipse Theia CVSS 3.1HIGH 7.5
- TI-2026-42788 Path traversal in Eclipse Theia CVSS 3.1HIGH 8.8
Sources
- CVE-2019-17636 · CVE Program
- CVE-2019-17636 · NVD
- FIRST EPSS
- GHSA-f7vx-j8mp-3h2x · GitHub Advisory Database · CC BY 4.0
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