CVE-2026-11569: Quay: quay: stored xss via filedrop svg upload

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-08 · updated 2026-11-01
Weakness: CWE-79

Description

A flaw was found in Quay. The filedrop endpoint accepts any mime type without validation, allowing an authenticated user with repository write access to upload a malicious SVG file containing JavaScript. The file is stored and served inline through the CDN, enabling stored cross-site scripting when a victim visits the archive URL.

Affected products

Red Hat Quay 3: all versions

References

https://access.redhat.com/security/cve/CVE-2026-11569
https://bugzilla.redhat.com/show_bug.cgi?id=2486194

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