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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.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
    • CWE-1427 - Improper Neutralization of Input Used for LLM Prompting
    Assigner
    Impacted products
    Vendor Product Version
    Eclipse Foundation Eclipse Theia Affected: 0 , < 1.71.0 (semver)
    Create a notification for this product.
    Credits
    Piotr Ryciak (https://gitlab.eclipse.org/void01)
    Show details on NVD website

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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.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
    Assigner
    Impacted products
    Vendor Product Version
    Eclipse Foundation Eclipse Theia Affected: 0 , < 1.69.0 (semver)
    Create a notification for this product.
    Credits
    Piotr Ryciak (https://gitlab.eclipse.org/void01)
    Show details on NVD website

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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.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1427 - Improper neutralization of input used for LLM prompting
    • CWE-829 - Inclusion of functionality from untrusted control sphere
    Assigner
    Impacted products
    Vendor Product Version
    Eclipse Foundation Eclipse Theia Affected: 0 , < 1.71.0 (semver)
    Create a notification for this product.
    Credits
    Piotr Ryciak (https://gitlab.eclipse.org/void01)
    Show details on NVD website

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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.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-201 - Insertion of Sensitive Information Into Sent Data
    • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
    Assigner
    Impacted products
    Vendor Product Version
    Eclipse Foundation Eclipse Theia Affected: 0 , < 1.71.0 (semver)
    Create a notification for this product.
    Credits
    Piotr Ryciak (https://gitlab.eclipse.org/void01)
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation @theia/plugin-ext Affected: unspecified , < 1.18.0 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    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
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: 0.3.9 , < unspecified (custom)
    Affected: unspecified , ≤ 1.8.1 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: unspecified , ≤ 0.16.0 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: unspecified , ≤ 1.8.0 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: unspecified , ≤ 1.2.0 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: 0.3.9 to 0.15.0
    Create a notification for this product.
    Show details on NVD website

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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.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
    Assigner
    Impacted products
    Vendor Product Version
    Eclipse Foundation Eclipse Theia Affected: 0 , < 1.69.0 (semver)
    Create a notification for this product.
    Credits
    Piotr Ryciak (https://gitlab.eclipse.org/void01)
    Show details on NVD website

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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.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-201 - Insertion of Sensitive Information Into Sent Data
    • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
    Assigner
    Impacted products
    Vendor Product Version
    Eclipse Foundation Eclipse Theia Affected: 0 , < 1.71.0 (semver)
    Create a notification for this product.
    Credits
    Piotr Ryciak (https://gitlab.eclipse.org/void01)
    Show details on NVD website

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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.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
    • CWE-1427 - Improper Neutralization of Input Used for LLM Prompting
    Assigner
    Impacted products
    Vendor Product Version
    Eclipse Foundation Eclipse Theia Affected: 0 , < 1.71.0 (semver)
    Create a notification for this product.
    Credits
    Piotr Ryciak (https://gitlab.eclipse.org/void01)
    Show details on NVD website

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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.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1427 - Improper neutralization of input used for LLM prompting
    • CWE-829 - Inclusion of functionality from untrusted control sphere
    Assigner
    Impacted products
    Vendor Product Version
    Eclipse Foundation Eclipse Theia Affected: 0 , < 1.71.0 (semver)
    Create a notification for this product.
    Credits
    Piotr Ryciak (https://gitlab.eclipse.org/void01)
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation @theia/plugin-ext Affected: unspecified , < 1.18.0 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    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
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: 0.3.9 , < unspecified (custom)
    Affected: unspecified , ≤ 1.8.1 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: unspecified , ≤ 0.16.0 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: unspecified , ≤ 1.8.0 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: unspecified , ≤ 1.2.0 (custom)
    Create a notification for this product.
    Show details on NVD website

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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
    Impacted products
    Vendor Product Version
    The Eclipse Foundation Eclipse Theia Affected: 0.3.9 to 0.15.0
    Create a notification for this product.
    Show details on NVD website

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