Analysis and contextual insights are available on OpenCVE Cloud.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
Sign in to view the affected projects.
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-fg94-h982-f3mm | Claude Code: Out-of-Band Data Exfiltration via Pre-Approved HuggingFace Domain in WebFetch |
Tue, 23 Jun 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Anthropics
Anthropics claude Code |
|
| Vendors & Products |
Anthropics
Anthropics claude Code |
Tue, 23 Jun 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 23 Jun 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Claude Code is an agentic coding tool. From 0.2.54 until 2.1.163, because the hostname huggingface.co was pre-approved as a bare hostname for the WebFetch tool, any path on that domain—including attacker-controlled model repositories—was auto-approved without a permission prompt or being subject to --allowedTools restrictions. An attacker able to inject untrusted content into a Claude Code context could direct it to issue WebFetch requests against attacker-controlled repository files (e.g. /resolve/main/config.json), which HuggingFace counts as downloads server-side, creating a covert out-of-band channel for encoding and exfiltrating data Claude can access such as files, environment variables, or command output. Reliably exploiting this required the ability to add untrusted content into a Claude Code context window. This vulnerability is fixed in 2.1.163. | |
| Title | Claude Code: Out-of-Band Data Exfiltration via Pre-Approved HuggingFace Domain in WebFetch | |
| Weaknesses | CWE-183 CWE-200 CWE-515 |
|
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-23T17:37:38.468Z
Reserved: 2026-06-12T18:42:02.223Z
Link: CVE-2026-54316
Updated: 2026-06-23T17:37:34.873Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-06-24T11:00:13Z
Github GHSA