How severe is CVE-2026-44691?

CVE-2026-44691 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-44691 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44691?

CVE-2026-44691 affects Eclipse Theia. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44691?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-44691 have an EU (EUVD) identifier?

Yes. CVE-2026-44691 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37901.

When was CVE-2026-44691 published?

CVE-2026-44691 was published on 2026-06-18 and last updated on 2026-06-22.

CVE-2026-44691

CVE-2026-44691 is a high-severity vulnerability in Eclipse Theia with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-829.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.4
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37901
Weakness: CWE-829
Affected product: Eclipse Theia
Published: 2026-06-18
Last modified: 2026-06-22

Description

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.

Frequently asked questions

What is CVE-2026-44691?: 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.
How severe is CVE-2026-44691?: CVE-2026-44691 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-44691 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44691?: CVE-2026-44691 affects Eclipse Theia. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44691?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-44691 have an EU (EUVD) identifier?: Yes. CVE-2026-44691 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37901.
When was CVE-2026-44691 published?: CVE-2026-44691 was published on 2026-06-18 and last updated on 2026-06-22.

References

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/116

Affected products (1)

cpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:*

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