CVE-2026-44691 json
[Eclipse Theia] Arbitrary Command Execution via Untrusted Workspace Task Definitions
published 2026-06-18 4 mo ago modified 2026-10-26 14 d ago also EUVD-2026-37901 , GHSA-g9jw-92q7-g7fj
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
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.
Patch / fix
- npm @theia/debug 1.69.0
- npm @theia/task 1.69.0
- npm @theia/workspace 1.69.0
- Eclipse Foundation Eclipse Theia 1.69.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.4 | 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 |
| CNA | 4.0 | 8.4 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @theia/debug | <1.69.0 |
1.69.0 |
| npm | @theia/task | <1.69.0 |
1.69.0 |
| npm | @theia/workspace | <1.69.0 |
1.69.0 |
Affected products
- Eclipse Foundation Eclipse Theia
Classification
- Weakness
-
- CWE-829 Inclusion of Functionality from Untrusted Control Sphere
References
-
gitlab.eclipse.org
/security/cve-assignment/-/work_items/116
web, patch, vendor-advisory
-
github.com
/eclipse-theia/theia/pull/16917
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-44691
advisory
-
github.com
/eclipse-theia/theia/issues/16889
web
-
github.com
/eclipse-theia/theia
package
-
gitlab.eclipse.org
/security/vulnerability-reports/-/work_items/331
web
Sources
- CVE List CVE-2026-44691
- GitHub Advisory GHSA-g9jw-92q7-g7fj
- NVD CVE-2026-44691
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.