CVE-2026-44688: eclipse foundation eclipse theia

Vulnerability summary

CVE-2026-44688 is a high (CVSS 8.8) vulnerability in eclipse foundation eclipse theia. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 42% of scored vulnerabilities.

Timeline

1. 18-06-2026
   PublishedVulnerability first disclosed.
2. 19-06-2026
   Last modifiedVulnerability information updated.

Description

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.

• CWE-1427Improper Neutralization of Input Used for LLM PromptingThe product uses externally-provided data to build prompts provided to large language models (LLMs), but the way these prompts are constructed causes the LLM to fail to distinguish between user-supplied inputs and developer provided system directives.
• CWE-829Inclusion of Functionality from Untrusted Control SphereThe product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.