CVE-2019-17636Network attack vector

Host file disclosure via origin-unrestricted HTTP endpoint

Published Mar 10, 2020 · Updated Aug 5, 2024

Arbitrary file read in Eclipse Theia 0.3.9 through 0.15.0 allows remote attackers to read host files through Mini-Browser HTTP requests. The Mini-Browser extension exposes a file-serving HTTP endpoint that accepts filesystem paths without verifying request origin or requiring an Electron window token. Exploitation requires a user to visit attacker-controlled content for DNS rebinding or a drive-by request, and exposes files readable by the backend process.

CVSS severity8.1
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file read in Eclipse Theia 0.3.9 through 0.15.0 allows remote attackers to read host files through Mini-Browser HTTP requests. The Mini-Browser extension exposes a file-serving HTTP endpoint that accepts filesystem paths without verifying request origin or requiring an Electron window token. Exploitation requires a user to visit attacker-controlled content for DNS rebinding or a drive-by request, and exposes files readable by the backend process.

The record

CVE
CVE-2019-17636
Published
Mar 10, 2020
Updated
Aug 5, 2024
Vendor
The Eclipse Foundation
Product
Eclipse Theia
Classifications
CWE-345, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.3.9 to 0.15.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse Theiaversion=0.3.9 to 0.15.0

Published CVSS scores

8.1GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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