Stored XSS via unvalidated filedrop MIME type
Published Jun 8, 2026 · Updated Jun 8, 2026
Stored cross-site scripting in Red Hat Quay allows remote authenticated users to execute JavaScript when a victim opens an archive URL. The POST /api/v1/filedrop/ endpoint accepts an attacker-supplied MIME type without validation, stores the uploaded SVG, and serves it inline through the CDN. Repository write access and a victim visit are required; the protected session cookie prevents session hijacking, limiting the reported effect to browser-context data access or modification.
Summary
What happened
Stored cross-site scripting in Red Hat Quay allows remote authenticated users to execute JavaScript when a victim opens an archive URL. The POST /api/v1/filedrop/ endpoint accepts an attacker-supplied MIME type without validation, stores the uploaded SVG, and serves it inline through the CDN. Repository write access and a victim visit are required; the protected session cookie prevents session hijacking, limiting the reported effect to browser-context data access or modification.
The record
- CVE
- CVE-2026-11569
- Published
- Jun 8, 2026
- Updated
- Jun 8, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Quay
- Classifications
- CWE-79, T1204.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 8, 2026CVE publishedPublication date reported by the CVE source.
- Jun 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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