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

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

CISA KEV SSVC: Active Exploitation
CVSS Base Score
9.6
CRITICAL
Exploitability:2.9
Impact Score:6.1
EPSS Probability:2.34%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—

Weaknesses (CWE)

CWE-506 ↗CWE-506: Embedded Malicious Code

Affected Products & Versions

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

References & Technical Advisories

No reference links found.

Threat Intelligence Signals

CISA KEV
ACTIVE IN CATALOG
EPSS Score
2.342%

Identity & Timeline

StatusPUBLISHED
Assigning AuthorityGitHub, Inc. · Vendor · USA
Reserved2026-05-11T20:50:30
Published2026-05-12T00:12:35
Last Updated2026-08-04T03:56:09

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