PoC Index85,092 CVEs with PoCs

CVE-2026-45321

Malware in 42 @tanstack/* packages exfiltrates cloud credentials, GitHub tokens, and SSH keys

KEV RANSOMWARECRITICAL 9.6EPSS 1.1%

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-stealing malware under a trusted identity. Each affected package received exactly two malicious versions, published a few minutes apart.

Affected
@tanstack · arktype-adapter · eslint-plugin-router · eslint-plugin-start · history · nitro-v2-vite-plugin · react-router
CVSS v3.1 GITHUB
9.6 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS
1.05% chance of exploitation in the next 30 days, 64th percentile
CISA KEV
added 2026-05-27, used in ransomware campaigns
Published
2026-05-12
Updated
2026-08-04

Proof-of-concept exploits (3)

Security advisories

References

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