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22 vulnerabilities found for theia by eclipse
CVE-2026-46580 (GCVE-0-2026-46580)
Vulnerability from nvd – Published: 2026-06-18 14:26 – Updated: 2026-06-19 03:55
VLAI
Summary
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 that, when the workspace was opened in Theia, replaced the AI's system instructions with attacker-controlled content (indirect prompt injection). Combined with other AI chat features available in untrusted workspaces, this enabled attack chains leading to data exfiltration via Markdown image rendering or arbitrary command execution via task definitions.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Theia |
Affected:
0 , < 1.71.0
(semver)
|
Credits
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CVE-2026-44691 (GCVE-0-2026-44691)
Vulnerability from nvd – Published: 2026-06-18 14:35 – Updated: 2026-06-19 03:55
VLAI
Summary
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 execution of arbitrary commands with the user's privileges. In combination with AI chat features and a workspace .theia/settings.json that disabled tool confirmation, this could be triggered automatically by sending a message in the AI chat.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Theia |
Affected:
0 , < 1.69.0
(semver)
|
Credits
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CVE-2026-44688 (GCVE-0-2026-44688)
Vulnerability from nvd – Published: 2026-06-18 14:22 – Updated: 2026-06-19 03:55
VLAI
Summary
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 that, when analyzed by the AI agent, would cause the agent to follow attacker-controlled instructions (indirect prompt injection). Combined with other AI chat features available in untrusted workspaces, this enabled attack chains leading to data exfiltration via Markdown image rendering or arbitrary command execution via task definitions.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Theia |
Affected:
0 , < 1.71.0
(semver)
|
Credits
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CVE-2026-22551 (GCVE-0-2026-22551)
Vulnerability from nvd – Published: 2026-06-18 14:32 – Updated: 2026-06-18 15:25
VLAI
Summary
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 construct image URLs encoding sensitive information from the workspace or conversation context, exfiltrating it to attacker-controlled servers. The workspace trust enforcement introduced in v1.71.0 mitigates the documented attack chain by disabling AI features in untrusted workspaces.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Theia |
Affected:
0 , < 1.71.0
(semver)
|
Credits
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CVE-2021-41038 (GCVE-0-2021-41038)
Vulnerability from nvd – Published: 2021-11-10 17:05 – Updated: 2024-08-04 02:59
VLAI
Summary
In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().
Severity
No CVSS data available.
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugs.eclipse.org/bugs/show_bug.cgi?id=575924 | x_refsource_CONFIRM |
| https://github.com/eclipse-theia/theia/pull/10125 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | @theia/plugin-ext |
Affected:
unspecified , < 1.18.0
(custom)
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CVE-2021-34436 (GCVE-0-2021-34436)
Vulnerability from nvd – Published: 2021-09-02 20:55 – Updated: 2024-08-04 00:12
VLAI
Summary
In 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. This extension uses lsp4xml (recently renamed to LemMinX) in order to provide language support for XML. This is installed by default.
Severity
No CVSS data available.
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.eclipse.org/bugs/show_bug.cgi?id=563174 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
0.1.1
Affected: 0.1.2 Affected: 0.2.0-next.28bc2735 Affected: 0.2.0-next.41406d98 Affected: 0.2.0-next.a2958907 |
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CVE-2021-34435 (GCVE-0-2021-34435)
Vulnerability from nvd – Published: 2021-09-01 17:20 – Updated: 2024-08-04 00:12
VLAI
Summary
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..
Severity
No CVSS data available.
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.eclipse.org/bugs/show_bug.cgi?id=568018 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
0.3.9 , < unspecified
(custom)
Affected: unspecified , ≤ 1.8.1 (custom) |
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CVE-2021-28162 (GCVE-0-2021-28162)
Vulnerability from nvd – Published: 2021-03-12 21:40 – Updated: 2024-08-03 21:40
VLAI
Summary
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.
Severity
No CVSS data available.
CWE
- CWE-830 - Inclusion of Web Functionality from an Untrusted Source
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/eclipse-theia/theia/issues/7283 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
unspecified , ≤ 0.16.0
(custom)
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CVE-2021-28161 (GCVE-0-2021-28161)
Vulnerability from nvd – Published: 2021-03-12 21:40 – Updated: 2024-08-03 21:40
VLAI
Summary
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.
Severity
No CVSS data available.
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/eclipse-theia/theia/issues/8794 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
unspecified , ≤ 1.8.0
(custom)
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CVE-2020-27224 (GCVE-0-2020-27224)
Vulnerability from nvd – Published: 2021-02-24 16:40 – Updated: 2024-08-04 16:11
VLAI
Summary
In Eclipse Theia versions up to and including 1.2.0, the Markdown Preview (@theia/preview), can be exploited to execute arbitrary code.
Severity
No CVSS data available.
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/eclipse-theia/theia/issues/7954 | x_refsource_CONFIRM |
| https://omespino.com/write-up-google-bug-bounty-x… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
unspecified , ≤ 1.2.0
(custom)
|
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CVE-2019-17636 (GCVE-0-2019-17636)
Vulnerability from nvd – Published: 2020-03-10 14:30 – Updated: 2024-08-05 01:47
VLAI
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.
Severity
No CVSS data available.
CWE
- CWE-345 - CWE: CWE-345: Insufficient Verification of Data Authenticity
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.eclipse.org/bugs/show_bug.cgi?id=551747 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
0.3.9 to 0.15.0
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CVE-2026-44691 (GCVE-0-2026-44691)
Vulnerability from cvelistv5 – Published: 2026-06-18 14:35 – Updated: 2026-06-19 03:55
VLAI
Summary
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 execution of arbitrary commands with the user's privileges. In combination with AI chat features and a workspace .theia/settings.json that disabled tool confirmation, this could be triggered automatically by sending a message in the AI chat.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Theia |
Affected:
0 , < 1.69.0
(semver)
|
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CVE-2026-22551 (GCVE-0-2026-22551)
Vulnerability from cvelistv5 – Published: 2026-06-18 14:32 – Updated: 2026-06-18 15:25
VLAI
Summary
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 construct image URLs encoding sensitive information from the workspace or conversation context, exfiltrating it to attacker-controlled servers. The workspace trust enforcement introduced in v1.71.0 mitigates the documented attack chain by disabling AI features in untrusted workspaces.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Theia |
Affected:
0 , < 1.71.0
(semver)
|
Credits
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CVE-2026-46580 (GCVE-0-2026-46580)
Vulnerability from cvelistv5 – Published: 2026-06-18 14:26 – Updated: 2026-06-19 03:55
VLAI
Summary
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 that, when the workspace was opened in Theia, replaced the AI's system instructions with attacker-controlled content (indirect prompt injection). Combined with other AI chat features available in untrusted workspaces, this enabled attack chains leading to data exfiltration via Markdown image rendering or arbitrary command execution via task definitions.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Theia |
Affected:
0 , < 1.71.0
(semver)
|
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CVE-2026-44688 (GCVE-0-2026-44688)
Vulnerability from cvelistv5 – Published: 2026-06-18 14:22 – Updated: 2026-06-19 03:55
VLAI
Summary
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 that, when analyzed by the AI agent, would cause the agent to follow attacker-controlled instructions (indirect prompt injection). Combined with other AI chat features available in untrusted workspaces, this enabled attack chains leading to data exfiltration via Markdown image rendering or arbitrary command execution via task definitions.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Theia |
Affected:
0 , < 1.71.0
(semver)
|
Credits
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CVE-2021-41038 (GCVE-0-2021-41038)
Vulnerability from cvelistv5 – Published: 2021-11-10 17:05 – Updated: 2024-08-04 02:59
VLAI
Summary
In versions of the @theia/plugin-ext component of Eclipse Theia prior to 1.18.0, Webview contents can be hijacked via postMessage().
Severity
No CVSS data available.
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugs.eclipse.org/bugs/show_bug.cgi?id=575924 | x_refsource_CONFIRM |
| https://github.com/eclipse-theia/theia/pull/10125 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | @theia/plugin-ext |
Affected:
unspecified , < 1.18.0
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CVE-2021-34436 (GCVE-0-2021-34436)
Vulnerability from cvelistv5 – Published: 2021-09-02 20:55 – Updated: 2024-08-04 00:12
VLAI
Summary
In 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. This extension uses lsp4xml (recently renamed to LemMinX) in order to provide language support for XML. This is installed by default.
Severity
No CVSS data available.
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.eclipse.org/bugs/show_bug.cgi?id=563174 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
0.1.1
Affected: 0.1.2 Affected: 0.2.0-next.28bc2735 Affected: 0.2.0-next.41406d98 Affected: 0.2.0-next.a2958907 |
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CVE-2021-34435 (GCVE-0-2021-34435)
Vulnerability from cvelistv5 – Published: 2021-09-01 17:20 – Updated: 2024-08-04 00:12
VLAI
Summary
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..
Severity
No CVSS data available.
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.eclipse.org/bugs/show_bug.cgi?id=568018 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
0.3.9 , < unspecified
(custom)
Affected: unspecified , ≤ 1.8.1 (custom) |
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CVE-2021-28162 (GCVE-0-2021-28162)
Vulnerability from cvelistv5 – Published: 2021-03-12 21:40 – Updated: 2024-08-03 21:40
VLAI
Summary
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.
Severity
No CVSS data available.
CWE
- CWE-830 - Inclusion of Web Functionality from an Untrusted Source
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/eclipse-theia/theia/issues/7283 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
unspecified , ≤ 0.16.0
(custom)
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CVE-2021-28161 (GCVE-0-2021-28161)
Vulnerability from cvelistv5 – Published: 2021-03-12 21:40 – Updated: 2024-08-03 21:40
VLAI
Summary
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.
Severity
No CVSS data available.
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/eclipse-theia/theia/issues/8794 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
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| The Eclipse Foundation | Eclipse Theia |
Affected:
unspecified , ≤ 1.8.0
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CVE-2020-27224 (GCVE-0-2020-27224)
Vulnerability from cvelistv5 – Published: 2021-02-24 16:40 – Updated: 2024-08-04 16:11
VLAI
Summary
In Eclipse Theia versions up to and including 1.2.0, the Markdown Preview (@theia/preview), can be exploited to execute arbitrary code.
Severity
No CVSS data available.
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/eclipse-theia/theia/issues/7954 | x_refsource_CONFIRM |
| https://omespino.com/write-up-google-bug-bounty-x… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
unspecified , ≤ 1.2.0
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CVE-2019-17636 (GCVE-0-2019-17636)
Vulnerability from cvelistv5 – Published: 2020-03-10 14:30 – Updated: 2024-08-05 01:47
VLAI
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.
Severity
No CVSS data available.
CWE
- CWE-345 - CWE: CWE-345: Insufficient Verification of Data Authenticity
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.eclipse.org/bugs/show_bug.cgi?id=551747 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Theia |
Affected:
0.3.9 to 0.15.0
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