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.

Metrics

CVSS 3.1 9.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-506

Affected software

Vendor	Product	Versions
@tanstack	arktype-adapter	1.166.12; 1.166.15
@tanstack	eslint-plugin-router	1.161.9; 1.161.12
@tanstack	eslint-plugin-start	0.0.4; 0.0.7
@tanstack	history	1.161.9; 1.161.12
@tanstack	nitro-v2-vite-plugin	1.154.12; 1.154.15
@tanstack	react-router	1.169.5; 1.169.8
@tanstack	react-router-devtools	1.166.16; 1.166.19
@tanstack	react-router-ssr-query	1.166.15; 1.166.18
@tanstack	react-start	1.167.68; 1.167.71
@tanstack	react-start-client	1.166.51; 1.166.54
@tanstack	react-start-rsc	0.0.47; 0.0.50
@tanstack	react-start-server	1.166.55; 1.166.58
@tanstack	router-cli	1.166.46; 1.166.49
@tanstack	router-core	1.169.5; 1.169.8
@tanstack	router-devtools	1.166.16; 1.166.19
@tanstack	router-devtools-core	1.167.6; 1.167.9
@tanstack	router-generator	1.166.45; 1.166.48
@tanstack	router-plugin	1.167.38; 1.167.41
@tanstack	router-ssr-query-core	1.168.3; 1.168.6
@tanstack	router-utils	1.161.11; 1.161.14
@tanstack	outer-vite-plugin	1.166.53; 1.166.56
@tanstack	solid-router	1.169.5; 1.169.8
@tanstack	solid-router-devtools	1.166.16; 1.166.19
@tanstack	solid-router-ssr-query	1.166.15; 1.166.18
@tanstack	solid-start	1.167.65; 1.167.68
@tanstack	solid-start-client	1.166.50; 1.166.53
@tanstack	solid-start-server	1.166.54; 1.166.57
@tanstack	start-client-core	1.168.5; 1.168.8
@tanstack	start-fn-stubs	1.161.9; 1.161.12
@tanstack	start-plugin-core	1.169.23; 1.169.26
@tanstack	start-server-core	1.167.33; 1.167.36
@tanstack	start-static-server-functions	1.166.44; 1.166.47
@tanstack	start-storage-context	1.166.38; 1.166.41
@tanstack	valibot-adapter	1.166.12; 1.166.15
@tanstack	virtual-file-routes	1.161.10; 1.161.13
@tanstack	vue-router	1.169.5; 1.169.8
@tanstack	vue-router-devtools	1.166.16; 1.166.19
@tanstack	vue-router-ssr-query	1.166.15; 1.166.18
@tanstack	vue-start	1.167.61; 1.167.64
@tanstack	vue-start-client	1.166.46; 1.166.49
@tanstack	vue-start-server	1.166.50; 1.166.53
@tanstack	zod-adapter	1.166.12; 1.166.15

References

https://github.com/TanStack/router/issues/7383Issue Tracking
https://github.com/TanStack/router/security/advisories/GHSA-g7cv-rxg3-hmpxMitigation, Vendor Advisory
https://tanstack.com/blog/npm-supply-chain-compromise-postmortemExploit, Vendor Advisory
https://www.stepsecurity.io/blog/mini-shai-hulud-is-back-a-self-spreading-supply-chain-attack-hits-the-npm-ecosystemExploit, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-45321US Government Resource

Timeline

Published: May 12, 2026
Last modified: Oct 26, 2026
Added to CISA KEV: May 27, 2026
NVD status: Analyzed