--- title: "CVE-2026-45321: Malware in 42 @tanstack/* packages… | CubePath" 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…" language: en source: https://cubepath.com/security/cve/CVE-2026-45321 --- # CVE-2026-45321: Malware in 42 @tanstack/* packages… | CubePath ## 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. Official description from the CVE record, published by GitHub\_M. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-45321) ## Key data ### CVSS 3.1 Critical 9.6 Score published by GitHub\_M in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | -------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | Required | A user has to do something first, such as opening a file or following a link. | | Scope | Changed | The impact can reach other components beyond the vulnerable one. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.03278 (3.3% probability) Percentile 88.5% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog TanStack Unspecified Vulnerability Added to the catalog May 27, 2026 Federal due date Jun 10, 2026 Ransomware campaigns Known use ### CISA assessment as of May 27, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable no Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-506](https://cwe.mitre.org/data/definitions/506.html) Embedded Malicious Code ## Affected products Products listed in the CVE record, as the CNA published them. - @tanstack arktype-adapter - affected: 1.166.12 - affected: 1.166.15 - @tanstack eslint-plugin-router - affected: 1.161.9 - affected: 1.161.12 - @tanstack eslint-plugin-start - affected: 0.0.4 - affected: 0.0.7 - @tanstack history - affected: 1.161.9 - affected: 1.161.12 - @tanstack nitro-v2-vite-plugin - affected: 1.154.12 - affected: 1.154.15 - @tanstack react-router - affected: 1.169.5 - affected: 1.169.8 - @tanstack react-router-devtools - affected: 1.166.16 - affected: 1.166.19 - @tanstack react-router-ssr-query - affected: 1.166.15 - affected: 1.166.18 - @tanstack react-start - affected: 1.167.68 - affected: 1.167.71 - @tanstack react-start-client - affected: 1.166.51 - affected: 1.166.54 - @tanstack react-start-rsc - affected: 0.0.47 - affected: 0.0.50 - @tanstack react-start-server - affected: 1.166.55 - affected: 1.166.58 - @tanstack router-cli - affected: 1.166.46 - affected: 1.166.49 - @tanstack router-core - affected: 1.169.5 - affected: 1.169.8 - @tanstack router-devtools - affected: 1.166.16 - affected: 1.166.19 - @tanstack router-devtools-core - affected: 1.167.6 - affected: 1.167.9 - @tanstack router-generator - affected: 1.166.45 - affected: 1.166.48 - @tanstack router-plugin - affected: 1.167.38 - affected: 1.167.41 - @tanstack router-ssr-query-core - affected: 1.168.3 - affected: 1.168.6 - @tanstack router-utils - affected: 1.161.11 - affected: 1.161.14 - @tanstack outer-vite-plugin - affected: 1.166.53 - affected: 1.166.56 - @tanstack solid-router - affected: 1.169.5 - affected: 1.169.8 - @tanstack solid-router-devtools - affected: 1.166.16 - affected: 1.166.19 - @tanstack solid-router-ssr-query - affected: 1.166.15 - affected: 1.166.18 - @tanstack solid-start - affected: 1.167.65 - affected: 1.167.68 - @tanstack solid-start-client - affected: 1.166.50 - affected: 1.166.53 - @tanstack solid-start-server - affected: 1.166.54 - affected: 1.166.57 - @tanstack start-client-core - affected: 1.168.5 - affected: 1.168.8 - @tanstack start-fn-stubs - affected: 1.161.9 - affected: 1.161.12 - @tanstack start-plugin-core - affected: 1.169.23 - affected: 1.169.26 - @tanstack start-server-core - affected: 1.167.33 - affected: 1.167.36 - @tanstack start-static-server-functions - affected: 1.166.44 - affected: 1.166.47 - @tanstack start-storage-context - affected: 1.166.38 - affected: 1.166.41 - @tanstack valibot-adapter - affected: 1.166.12 - affected: 1.166.15 - @tanstack virtual-file-routes - affected: 1.161.10 - affected: 1.161.13 - @tanstack vue-router - affected: 1.169.5 - affected: 1.169.8 - @tanstack vue-router-devtools - affected: 1.166.16 - affected: 1.166.19 - @tanstack vue-router-ssr-query - affected: 1.166.15 - affected: 1.166.18 - @tanstack vue-start - affected: 1.167.61 - affected: 1.167.64 - @tanstack vue-start-client - affected: 1.166.46 - affected: 1.166.49 - @tanstack vue-start-server - affected: 1.166.50 - affected: 1.166.53 - @tanstack zod-adapter - affected: 1.166.12 - affected: 1.166.15 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [github.com/TanStack/router/security/advisories/GHSA-g7cv-rx…](https://github.com/TanStack/router/security/advisories/GHSA-g7cv-rxg3-hmpx) - [github.com/TanStack/router/issues/7383](https://github.com/TanStack/router/issues/7383) - [tanstack.com/blog/npm-supply-chain-compromise-postmortem](https://tanstack.com/blog/npm-supply-chain-compromise-postmortem) - [stepsecurity.io/blog/mini-shai-hulud-is-back-a-self-spreadi…](https://www.stepsecurity.io/blog/mini-shai-hulud-is-back-a-self-spreading-supply-chain-attack-hits-the-npm-ecosystem) ## Timeline 1. ID reserved May 11, 2026 2. Record published May 12, 2026 3. Added to CISA KEV May 27, 2026 4. Record last updated Aug 4, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:00 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)