# Eclipse Foundation Open VSX vulnerabilities

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

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Eclipse Foundation Open VSX: 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-90882, was published on 22 September 2026. Nothing in the last four weeks, down from 2 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 4 (0 critical, 0 exploited in the wild)

## About Eclipse Foundation Open VSX

An open-source registry for VS Code extensions that provides a vendor-neutral alternative to the Visual Studio Marketplace.

## Latest Eclipse Foundation Open VSX vulnerabilities

- [CVE-2026-90882: Open VSX CORS misconfiguration with credential reflection](https://junglewise.ai/threats/cve-2026-90882-the-open-vsx-org-deployment-returned-access-control-allow-origin) (info, published 22 Sep 2026)
- [CVE-2026-89321: Open VSX decompression bomb in VSIX file extraction](https://junglewise.ai/threats/cve-2026-89321-open-vsx-decompression-bomb-in-vsix-file-extraction) (medium, CVSS 4.3, published 14 Sep 2026)
- [CVE-2026-13323: Eclipse Open VSX stored XSS in unpkg endpoint](https://junglewise.ai/threats/cve-2026-13323-eclipse-open-vsx-stored-xss-in-unpkg-endpoint) (medium, CVSS 4.1, published 1 Jul 2026)
- [CVE-2026-4983: Eclipse Open VSX stored XSS in extension icons](https://junglewise.ai/threats/cve-2026-4983-eclipse-open-vsx-stored-xss-in-extension-icons) (medium, CVSS 4.1, published 23 Jun 2026)

## Most severe Eclipse Foundation Open VSX vulnerabilities

- [CVE-2026-89321: Open VSX decompression bomb in VSIX file extraction](https://junglewise.ai/threats/cve-2026-89321-open-vsx-decompression-bomb-in-vsix-file-extraction) (medium, CVSS 4.3, published 14 Sep 2026)
- [CVE-2026-13323: Eclipse Open VSX stored XSS in unpkg endpoint](https://junglewise.ai/threats/cve-2026-13323-eclipse-open-vsx-stored-xss-in-unpkg-endpoint) (medium, CVSS 4.1, published 1 Jul 2026)
- [CVE-2026-4983: Eclipse Open VSX stored XSS in extension icons](https://junglewise.ai/threats/cve-2026-4983-eclipse-open-vsx-stored-xss-in-extension-icons) (medium, CVSS 4.1, published 23 Jun 2026)
- [CVE-2026-90882: Open VSX CORS misconfiguration with credential reflection](https://junglewise.ai/threats/cve-2026-90882-the-open-vsx-org-deployment-returned-access-control-allow-origin) (info, published 22 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 2 vulnerabilities in the four before.

| 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 | 1 | 0 | 0 |
| 21 Sep 2026 | 1 | 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 |

## Other Eclipse Foundation technologies

- [Eclipse Foundation Jetty](https://junglewise.ai/threats/technologies/jetty): 9 vulnerabilities
- [Eclipse Foundation Theia](https://junglewise.ai/threats/technologies/theia): 6 vulnerabilities
- [Eclipse Foundation GlassFish](https://junglewise.ai/threats/technologies/glassfish): 4 vulnerabilities
- [Eclipse Foundation BaSyx Java Server SDK](https://junglewise.ai/threats/technologies/basyx-java-server-sdk): 3 vulnerabilities
- [Eclipse Foundation CSI - PIA](https://junglewise.ai/threats/technologies/csi-pia): 3 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, "Eclipse Foundation Open VSX vulnerabilities", https://junglewise.ai/threats/technologies/open-vsx, 9 November 2026.