CVE-2026-46580

HIGH EPSS 18.9%
Published Jun 18, 20261w ago · Modified Jun 22, 20261w ago
8.4 CVSS 4.0
High
Find Similar
Published Jun 18, 2026 1w ago
Last Modified Jun 22, 2026 1w ago

Description

In Eclipse Theia versions prior to 1.71.0, files matching the pattern .prompts/*.prompttemplate in a workspace were automatically loaded and could override or extend the AI agent's system prompts. An attacker could craft a malicious repository containing prompt template files that, when the workspace was opened in Theia, replaced the AI's system instructions with attacker-controlled content (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.

CVSS Details

Base Score
8.4
Exploitability
—
Impact
—
Vector string
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
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction A
Scope X

Threat Intelligence

EPSS Exploit Probability
18.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-829

Affected Products 1

VendorProductVersionRange
eclipsetheia* <1.71.0

References 1

  • gitlab.eclipse.org https://gitlab.eclipse.org/security/cve-assignment/-/work_items/114
    Vendor AdvisoryPatch

Remediation

  • gitlab.eclipse.org https://gitlab.eclipse.org/security/cve-assignment/-/work_items/114
    Vendor AdvisoryPatch