CVE-2026-45321 KEV
Patch first
On CISA KEV — known exploited in the wild, due 2026-06-10.
Description
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.
Scoring
| CVSS | 9.6 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| EPSS | 1.05% — more likely to be exploited than 63% of all CVEs |
| Weakness | CWE-506 |
| On CISA KEV | yes — remediate by 2026-06-10 |
| Public exploit | none known |
| Published | 2026-05-12 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | TanStack Unspecified Vulnerability |
|---|---|
| Added | 2026-05-27 |
| Due | 2026-06-10 |
| Vendor / product | TanStack / TanStack |
| Ransomware use | known |
Affected (40)
| Vendor | Product |
|---|---|
| tanstack | tanstack\/arktype-adapter |
| tanstack | tanstack\/eslint-plugin-router |
| tanstack | tanstack\/eslint-plugin-start |
| tanstack | tanstack\/history |
| tanstack | tanstack\/nitro-v2-vite-plugin |
| tanstack | tanstack\/react-router |
| tanstack | tanstack\/react-router-devtools |
| tanstack | tanstack\/react-router-ssr-query |
| tanstack | tanstack\/react-start |
| tanstack | tanstack\/react-start-client |
| tanstack | tanstack\/react-start-rsc |
| tanstack | tanstack\/react-start-server |
| tanstack | tanstack\/router-cli |
| tanstack | tanstack\/router-core |
| tanstack | tanstack\/router-devtools |
| tanstack | tanstack\/router-devtools-core |
| tanstack | tanstack\/router-generator |
| tanstack | tanstack\/router-plugin |
| tanstack | tanstack\/router-ssr-query-core |
| tanstack | tanstack\/router-utils |
| tanstack | tanstack\/router-vite-plugin |
| tanstack | tanstack\/solid-router |
| tanstack | tanstack\/solid-router-devtools |
| tanstack | tanstack\/solid-router-ssr-query |
| tanstack | tanstack\/solid-start |
| tanstack | tanstack\/solid-start-client |
| tanstack | tanstack\/solid-start-server |
| tanstack | tanstack\/start-client-core |
| tanstack | tanstack\/start-fn-stubs |
| tanstack | tanstack\/start-plugin-core |
| tanstack | tanstack\/start-server-core |
| tanstack | tanstack\/start-static-server-functions |
| tanstack | tanstack\/start-storage-context |
| tanstack | tanstack\/valibot-adapter |
| tanstack | tanstack\/virtual-file-routes |
| tanstack | tanstack\/vue-router |
| tanstack | tanstack\/vue-router-devtools |
| tanstack | tanstack\/vue-router-ssr-query |
| tanstack | tanstack\/vue-start |
| tanstack | tanstack\/vue-start-client |
References
- https://github.com/TanStack/router/issues/7383
- https://github.com/TanStack/router/security/advisories/GHSA-g7cv-rxg3-hmpx
- https://tanstack.com/blog/npm-supply-chain-compromise-postmortem
- https://www.stepsecurity.io/blog/mini-shai-hulud-is-back-a-self-spreading-supply-chain-attack-hits-the-npm-ecosystem
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45321
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