# ElysiaJS vulnerabilities

Source: https://junglewise.ai/threats/vendors/elysiajs  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/elysiajs.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in ElysiaJS: 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-56669, was published on 8 July 2026. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 4 (1 critical, 0 exploited in the wild)

## About ElysiaJS

elysiajs is the organization behind the Elysia web framework.

## Latest ElysiaJS vulnerabilities

- [CVE-2026-56669: Elysia denial of service via quadratic complexity in form data normalization](https://junglewise.ai/threats/cve-2026-56669-elysia-denial-of-service-via-quadratic-complexity-in-form-data) (high, CVSS 7.5, published 8 Jul 2026)
- [CVE-2025-66457: Elysia arbitrary code injection through cookie config](https://junglewise.ai/threats/cve-2025-66457-elysia-arbitrary-code-injection-through-cookie-config) (high, CVSS 8.8, published 9 Dec 2025)
- [CVE-2025-66456: Elysia prototype pollution in schema validation](https://junglewise.ai/threats/cve-2025-66456-elysia-prototype-pollution-in-schema-validation) (critical, CVSS 9.8, published 9 Dec 2025)
- [CVE-2025-50864: elysiajs elysia-cors CORS bypass via origin validation error](https://junglewise.ai/threats/cve-2025-50864-elysiajs-elysia-cors-cors-bypass-via-origin-validation-error) (medium, CVSS 6.5, published 20 Aug 2025)

## Most severe ElysiaJS vulnerabilities

- [CVE-2025-66456: Elysia prototype pollution in schema validation](https://junglewise.ai/threats/cve-2025-66456-elysia-prototype-pollution-in-schema-validation) (critical, CVSS 9.8, published 9 Dec 2025)
- [CVE-2025-66457: Elysia arbitrary code injection through cookie config](https://junglewise.ai/threats/cve-2025-66457-elysia-arbitrary-code-injection-through-cookie-config) (high, CVSS 8.8, published 9 Dec 2025)
- [CVE-2026-56669: Elysia denial of service via quadratic complexity in form data normalization](https://junglewise.ai/threats/cve-2026-56669-elysia-denial-of-service-via-quadratic-complexity-in-form-data) (high, CVSS 7.5, published 8 Jul 2026)
- [CVE-2025-50864: elysiajs elysia-cors CORS bypass via origin validation error](https://junglewise.ai/threats/cve-2025-50864-elysiajs-elysia-cors-cors-bypass-via-origin-validation-error) (medium, CVSS 6.5, published 20 Aug 2025)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| 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 | 0 | 0 | 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 |

## ElysiaJS technologies

- [Elysiajs-Elysia](https://junglewise.ai/threats/technologies/elysia): 5 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, "ElysiaJS vulnerabilities", https://junglewise.ai/threats/vendors/elysiajs, 9 November 2026.