CVE-2026-45321: Malware in 42 @tanstack/* packages exfiltrates cloud credentials, GitHub tokens, and SSH keys
In CISA’s Known Exploited Vulnerabilities catalog: TanStack Unspecified Vulnerability.
Added , federal remediation due . Known ransomware use: Known.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H · CWE-506
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
@tanstack: arktype-adapter@tanstack: eslint-plugin-router@tanstack: eslint-plugin-start@tanstack: history@tanstack: nitro-v2-vite-plugin@tanstack: outer-vite-plugin@tanstack: react-router@tanstack: react-router-devtools@tanstack: react-router-ssr-query@tanstack: react-start@tanstack: react-start-client@tanstack: react-start-rsc@tanstack: react-start-server@tanstack: router-cli@tanstack: router-core@tanstack: router-devtools@tanstack: router-devtools-core@tanstack: router-generator@tanstack: router-plugin@tanstack: router-ssr-query-core@tanstack: router-utils@tanstack: solid-router@tanstack: solid-router-devtools@tanstack: solid-router-ssr-query@tanstack: solid-start@tanstack: solid-start-client@tanstack: solid-start-server@tanstack: start-client-core@tanstack: start-fn-stubs@tanstack: start-plugin-core@tanstack: start-server-core@tanstack: start-static-server-functions@tanstack: start-storage-context@tanstack: valibot-adapter@tanstack: virtual-file-routes@tanstack: vue-router@tanstack: vue-router-devtools@tanstack: vue-router-ssr-query@tanstack: vue-start@tanstack: vue-start-client@tanstack: vue-start-server@tanstack: zod-adapter
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/TanStack/router/issues/7383 (opens in new tab)
- github.com/TanStack/router/security/advisories/GHSA-g7cv-rxg3-hmpx (opens in new tab)
- tanstack.com/blog/npm-supply-chain-compromise-postmortem (opens in new tab)
- www.stepsecurity.io/blog/mini-shai-hulud-is-back-a-self-spreading-supply-chain-attack-hit… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)