# CVE-2026-45321

> On 2026-05-11, between approximately 19:20 and 19:26 UTC, 84 malicious versions across 42 @tanstack/* packages were published to the npm registry. The publishes were authenticated via the legitimate GitHub Actions OIDC trusted-publisher binding for TanStack/router, but the publish workflow itself was not modified. The attacker chained three known vulnerability classes — a pull_request_target "Pwn Request" misconfiguration, GitHub Actions cache poisoning across the fork↔base trust boundary, and runtime memory extraction of the OIDC token from the Actions runner process — to publish credential-s

- **CVSS:** 9.6 (CRITICAL)
- **EPSS:** 15.1%
- **CISA KEV:** yes (known ransomware use)
- **CWE:** CWE-506

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-45321
Full threat coverage + IOCs via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp