Vulnerability-Lookup

CVE-2026-44691 (GCVE-0-2026-44691)

Vulnerability from cvelistv5 – Published: 2026-06-18 14:35 – Updated: 2026-06-19 03:55

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

8.4 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-18 00:00 UTC

CWE

CWE-829 - Inclusion of Functionality from Untrusted Control Sphere

Assigner

eclipse mitre root

References

1 reference

URL	Tags
https://gitlab.eclipse.org/security/cve-assignmen…

Impacted products

1 product

Vendor	Product	Version	CPE status
Eclipse Foundation	Eclipse Theia	Affected: 0 , < 1.69.0 (semver)	guessed

Credits

Piotr Ryciak (https://gitlab.eclipse.org/void01)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-44691

Vulnerability from fkie_nvd - Published: 2026-06-18 16:16 - Updated: 2026-06-22 19:47

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	emo@eclipse.org	https://gitlab.eclipse.org/security/cve-assignment/-/work_items/116	Patch, Vendor Advisory

Impacted products

	Vendor	Product	Version
	eclipse	theia	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Eclipse Theia",
          "repo": "https://github.com/eclipse-theia/theia",
          "vendor": "Eclipse Foundation",
          "versions": [
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              "lessThan": "1.69.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "emo@eclipse.org"
    }
  ],
  "configurations": [
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    }
  ],
  "id": "CVE-2026-44691",
  "lastModified": "2026-06-22T19:47:14.750",
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          "integrityImpact": "HIGH",
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          "userInteraction": "REQUIRED",
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}

GHSA-G9JW-92Q7-G7FJ

Vulnerability from github – Published: 2026-06-18 18:35 – Updated: 2026-06-19 19:20

Summary

[Eclipse Theia] Arbitrary Command Execution via Untrusted Workspace Task Definitions

Details

Severity

8.4 (High)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

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        "name": "@theia/debug"
      },
      "ranges": [
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          "events": [
            {
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        "name": "@theia/task"
      },
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              "introduced": "0"
            },
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          ],
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        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44691"
  ],
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    "cwe_ids": [
      "CWE-829"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T19:20:20Z",
    "nvd_published_at": "2026-06-18T16:16:54Z",
    "severity": "HIGH"
  },
  "details": "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\u0027s 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.",
  "id": "GHSA-g9jw-92q7-g7fj",
  "modified": "2026-06-19T19:20:20Z",
  "published": "2026-06-18T18:35:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44691"
    },
    {
      "type": "WEB",
      "url": "https://github.com/eclipse-theia/theia/issues/16889"
    },
    {
      "type": "WEB",
      "url": "https://github.com/eclipse-theia/theia/pull/16917"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/eclipse-theia/theia"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/116"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/331"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "[Eclipse Theia] Arbitrary Command Execution via Untrusted Workspace Task Definitions"
}

ubuntu-cve-2026-44691

Vulnerability from osv_ubuntu

Published

2026-06-18 16:16

Modified

2026-06-24 09:02

Summary

Details

Severity

8.4 (High)


                    
                      CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

8.8 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-44691	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-44691	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "eclipse",
            "binary_version": "3.8.1-8"
          },
          {
            "binary_name": "eclipse-jdt",
            "binary_version": "3.8.1-8"
          },
          {
            "binary_name": "eclipse-pde",
            "binary_version": "3.8.1-8"
          },
          {
            "binary_name": "eclipse-platform",
            "binary_version": "3.8.1-8"
          },
          {
            "binary_name": "eclipse-platform-data",
            "binary_version": "3.8.1-8"
          },
          {
            "binary_name": "eclipse-rcp",
            "binary_version": "3.8.1-8"
          },
          {
            "binary_name": "libequinox-osgi-java",
            "binary_version": "3.8.1-8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "eclipse",
        "purl": "pkg:deb/ubuntu/eclipse@3.8.1-8?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.8.1-8"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "eclipse",
            "binary_version": "3.8.1-11"
          },
          {
            "binary_name": "eclipse-jdt",
            "binary_version": "3.8.1-11"
          },
          {
            "binary_name": "eclipse-pde",
            "binary_version": "3.8.1-11"
          },
          {
            "binary_name": "eclipse-platform",
            "binary_version": "3.8.1-11"
          },
          {
            "binary_name": "eclipse-platform-data",
            "binary_version": "3.8.1-11"
          },
          {
            "binary_name": "eclipse-rcp",
            "binary_version": "3.8.1-11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "eclipse",
        "purl": "pkg:deb/ubuntu/eclipse@3.8.1-11?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.8.1-10",
        "3.8.1-11"
      ]
    }
  ],
  "aliases": [],
  "details": "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\u0027s 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.",
  "id": "UBUNTU-CVE-2026-44691",
  "modified": "2026-06-24T09:02:13Z",
  "published": "2026-06-18T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44691"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-44691"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-44691"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-44691 (GCVE-0-2026-44691)

FKIE_CVE-2026-44691

GHSA-G9JW-92Q7-G7FJ

ubuntu-cve-2026-44691

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature

Related by attack behaviour