Vendor

theia vulnerabilities

10 published CVES affecting theia, from public sources (CVE.org, NVD, CISA KEV, FIRST EPSS, OSV).

Total: 10
Critical: 1
High: 5
Medium: 4
Low: 0
Unscored: 0
CISA KEV: 0

Products

Latest theia CVEs

Newest publication first

CVE-2026-44691 [Eclipse Theia] Arbitrary Command Execution via Untrusted Workspace Task Definitions
Published 2026-06-18

HighCVSS 8.4 EPSS 0.41%

In 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 without requiring workspace trust. An attacker could craft a malicious repository that, when cloned and opened in Theia, leads to e...
CVE-2026-22551 [Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat
Published 2026-06-18

MediumCVSS 6.7 EPSS 0.31%

In Eclipse Theia versions prior to 1.71.0, the AI chat rendered Markdown image tags from AI responses, triggering HTTP requests to arbitrary external URLs without restriction. Combined with prompt injection in a malicious workspace, an attacker could induce the AI agent to constr...
CVE-2026-46580 [Eclipse Theia] Indirect Prompt Injection via Auto-Loaded Workspace Prompt Template Files in AI Chat
Published 2026-06-18

HighCVSS 8.4 EPSS 0.51%

In Eclipse Theia versions prior to 1.71.0, files matching the pattern .prompts/*.prompttemplate in a workspace were automatically loaded and could override or extend the AI agent's system prompts. An attacker could craft a malicious repository containing prompt template files tha...
CVE-2026-44688 [Eclipse Theia] Indirect Prompt Injection via Adversarial Workspace File and Directory Names in AI Chat
Published 2026-06-18

HighCVSS 8.4 EPSS 0.51%

In 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 distinguishing them from system instructions. An attacker could craft a malicious repository with adversarial directory or file names th...
CVE-2021-41038 Improper Verification of Communication Channel in @theia/plugin-ext
Published 2021-11-10

MediumCVSS 6.1 EPSS 0.74%

In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().
CVE-2021-34435 Remote code execution in Eclipse Theia
Published 2021-09-01

HighCVSS 8.8 EPSS 0.60%

In 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 made it is possible for a previewed HTML file to trigger an RCE. This exploit only happens if a user previews a malicious file..
CVE-2021-28162 Command Injection in @theia/messages
Published 2021-03-12

MediumCVSS 6.1 EPSS 0.78%

In Eclipse Theia versions up to and including 0.16.0, in the notification messages there is no HTML escaping, so Javascript code can run.
CVE-2021-28161 Improper Neutralization of Input in Theia console
Published 2021-03-12

MediumCVSS 6.1 EPSS 0.71%

In Eclipse Theia versions up to and including 1.8.0, in the debug console there is no HTML escaping, so arbitrary Javascript code can be injected.
CVE-2020-27224 Cross-site Scripting (XSS) in Eclipse Theia
Published 2021-02-24

CriticalCVSS 9.6 EPSS 2.6%

In Eclipse Theia versions up to and including 1.2.0, the Markdown Preview (@theia/preview), can be exploited to execute arbitrary code.
CVE-2019-17636 Insufficient Verification of Data Authenticity in Eclipse Theia
Published 2020-03-10

HighCVSS 8.1 EPSS 0.60%

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 f...

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.