CVE-2026-54316 Claude Code: Out-of-Band Data Exfiltration via Pre-Approved HuggingFace Domain in WebFetch

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 ...

1shot (>=0.0.3, <=0.0.9), @4via6/relay (>=1.0.0, <=1.1.3) +251 more potentially affected by CVE-2026-54316 via @anthropic-ai/claude-code (>=0.2.126, <=2.1.154)

@anthropic-ai/claude-code NPM version =0.2.126, =0.0.3, =1.0.0, =2.1.0, =0.1.18, =1.0.0, =0.4.0, =1.0.0, =0.2.3, =0.0.1, =0.0.1, =0.0.55, =0.0.69 and more Source cves: CVE-2026-54316 Source advisory: SNYK:JS-ANTHROPICAICLAUDECODE-17391874...

1shot (>=0.0.3, <=0.0.9), @4via6/relay (>=1.0.0, <=1.1.3) +251 more potentially affected by CVE-2026-54316 via @anthropic-ai/claude-code (>=0.2.126, <=2.1.154)

@anthropic-ai/claude-code NPM version =0.2.126, =0.0.3, =1.0.0, =2.1.0, =0.1.18, =1.0.0, =0.4.0, =1.0.0, =0.2.3, =0.0.1, =0.0.1, =0.0.55, =0.0.69 and more Source cves: CVE-2026-54316 Source advisory: OSV:GHSA-FG94-H982-F3MM...