GCD AI RADAR
incidents/AIR-2026-0219

CVE-2026-103012: Claude Code API Key Precedence Policy Bypass

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerabilityData leak

Claude Code incorrectly prioritized stored personal API keys over valid enterprise logins during initialization. This caused sessions to start without server-managed policy enforcement when validation failed.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Infrastructure vulnerabilityprimary
    CVEs and advisories in AI frameworks, inference servers, MCP servers, AI developer tools and hosting stacks.
  • Data leak
    Training data, chat logs, system prompts, model weights or other AI-system data exposed.
owasp llm top 10
mitre atlas
no technique for these categories
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
2 · Disclosed vulnerability
CVE or vendor advisory, patched or patchable, no confirmed exploitation.
targets
Anthropic, Framework / tooling
products
Claude Code
incident date
30 Sep 2026
first reported
30 Sep 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
CVE-2026-103012 · claude_code · api_key · policy_bypass
record
created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z · json

Sources · 1

  1. 2026-09-30
    CVE-2026-103012: Claude Code selected an API key stored by Claude Code, for example from an earlier `/login` or written directly to its…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-103012

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