XSS in Eclipse Foundation Open Vsx
CVE-2026-13323
In Open VSX Registry before 1.0.2, the /vscode/unpkg/ endpoint serves user-supplied HTML files with Content-Type: text/html and without a Content-Security-Policy or Content-Disposition: attachment response header. An unauthenticated attack…
Vulnerability class: XSS (Cross-Site Scripting)
CVSS v3 metric
CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N.
Affected products
- Eclipse Foundation Open Vsx — versions 0.1.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-13323?
- CVE-2026-13323 is a medium-severity vulnerability in Eclipse Foundation Open Vsx, classified under Cross-site Scripting. CVSS score: 4.1/10. Published 2026-07-01.
- How severe is CVE-2026-13323?
- Medium severity. CVSS v3 base score is 4.1 out of 10.