🛡️ CVE-2026-44688 — theia
Description
[Eclipse Theia] Indirect Prompt Injection via Adversarial Workspace File and Directory Names in AI Chat
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.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.
Weakness class
CVE-2026-44688 is classified as CWE-829: Inclusion of Functionality from Untrusted Control Sphere. Code is loaded from a source outside the product's control, so that source can change what runs.
Affected software
CVE-2026-44688 is recorded against 8 packages.
- @theia/ai-chat
- @theia/ai-chat-ui
- @theia/ai-claude-code
- @theia/ai-code-completion
- @theia/ai-core
- @theia/ai-editor
- @theia/ai-ide
- theia (fixed in 1.71.0)
Timeline and source
Published on 18 June 2026 and last revised on 19 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.
References
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Web)
github.com (Package)
gitlab.eclipse.org (Web)
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| @theia/ai-chat | — | — |
| @theia/ai-chat-ui | — | — |
| @theia/ai-claude-code | — | — |
| @theia/ai-code-completion | — | — |
| @theia/ai-core | — | — |
| @theia/ai-editor | — | — |
| @theia/ai-ide | — | — |
| theia | — | 1.71.0 |
References
Similar Threats
- Medium CVE-2026-22551
- High CVE-2026-46580
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
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