# @tanstack/start-server-core (npm) vulnerabilities

Source: https://junglewise.ai/threats/technologies/tanstack-start-server-core  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/tanstack-start-server-core.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in @tanstack/start-server-core (npm): 0 in the last 7 days and 1 in the last 90 days, 2 of them critical and 1 exploited in the wild. The most recent, CVE-2026-102989, was published on 13 October 2026. 1 vulnerability in the last four weeks, up from none in the four before. 1 critical against 0.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 3 (2 critical, 1 exploited in the wild)

## About @tanstack/start-server-core (npm)

@tanstack/start-server-core is a server-side framework library for building full-stack web applications with TanStack Start.

## Latest @tanstack/start-server-core (npm) vulnerabilities

- [CVE-2026-102989: TanStack Start reflected XSS in server-function responses](https://junglewise.ai/threats/cve-2026-102989-tanstack-router-unauthenticated-reflected-xss-in-tanstack-start) (critical, CVSS 9.3, published 13 Oct 2026)
- [TanStack Start Server Core type confusion in request deserialization](https://junglewise.ai/threats/tanstack-start-server-core-type-confusion-in-request-deserialization-53e6cf74) (medium, CVSS 4, published 14 May 2026)
- [CVE-2026-45321: TanStack npm packages supply chain compromise via GitHub Actions OIDC hijacking](https://junglewise.ai/threats/cve-2026-45321-tanstack-npm-packages-supply-chain-compromise-via-github-actions) (critical, exploited in the wild, CVSS 9.6, published 12 May 2026)

## Most severe @tanstack/start-server-core (npm) vulnerabilities

- [CVE-2026-45321: TanStack npm packages supply chain compromise via GitHub Actions OIDC hijacking](https://junglewise.ai/threats/cve-2026-45321-tanstack-npm-packages-supply-chain-compromise-via-github-actions) (critical, exploited in the wild, CVSS 9.6, published 12 May 2026)
- [CVE-2026-102989: TanStack Start reflected XSS in server-function responses](https://junglewise.ai/threats/cve-2026-102989-tanstack-router-unauthenticated-reflected-xss-in-tanstack-start) (critical, CVSS 9.3, published 13 Oct 2026)
- [TanStack Start Server Core type confusion in request deserialization](https://junglewise.ai/threats/tanstack-start-server-core-type-confusion-in-request-deserialization-53e6cf74) (medium, CVSS 4, published 14 May 2026)

## Vulnerabilities per week

1 vulnerability in the last four weeks, up from none in the four before. 1 critical against 0.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 1 | 1 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other npm technologies

- [openclaw (npm)](https://junglewise.ai/threats/technologies/npm-openclaw): 214 vulnerabilities
- [flowise (npm)](https://junglewise.ai/threats/technologies/flowise): 133 vulnerabilities
- [parse-server (npm)](https://junglewise.ai/threats/technologies/parse-server): 117 vulnerabilities
- [vm2 (npm)](https://junglewise.ai/threats/technologies/vm2): 111 vulnerabilities
- [electron (npm)](https://junglewise.ai/threats/technologies/electron): 77 vulnerabilities
- [ghost (npm)](https://junglewise.ai/threats/technologies/ghost): 74 vulnerabilities
- [n8n (npm)](https://junglewise.ai/threats/technologies/npm-n8n): 64 vulnerabilities
- [hono (npm)](https://junglewise.ai/threats/technologies/hono): 62 vulnerabilities
- [directus (npm)](https://junglewise.ai/threats/technologies/directus): 61 vulnerabilities
- [nocodb (npm)](https://junglewise.ai/threats/technologies/nocodb): 54 vulnerabilities
- [undici (npm)](https://junglewise.ai/threats/technologies/undici): 53 vulnerabilities
- [@budibase/server (npm)](https://junglewise.ai/threats/technologies/budibase-server): 42 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "@tanstack/start-server-core (npm) vulnerabilities", https://junglewise.ai/threats/technologies/tanstack-start-server-core, 13 November 2026.