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CVE-2026-11569 Red Hat CVE debrief

CVE-2026-11569 is a MEDIUM severity vulnerability in Quay's filedrop endpoint. The 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. The CVSS score for this vulnerability is 5.4.

Vendor
Red Hat
Product
Red Hat Quay 3
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Users of Quay, especially those with repository write access, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The filedrop endpoint in Quay does not validate mime types, allowing authenticated users with repository write access to upload malicious SVG files containing JavaScript. When a victim visits the archive URL, the JavaScript is executed, enabling stored cross-site scripting.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update Quay to a version that validates mime types for uploaded files.
  • Restrict repository write access to trusted users.
  • Use a Web Application Firewall (WAF) to detect and prevent cross-site scripting attacks.

Evidence notes

The CVE-2026-11569 vulnerability was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-11569) and has a CVSS score of 5.4. Additional information can be found on [nvd](https://nvd.nist.gov/vuln/detail/CVE-2026-11569).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11569 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11569

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11569 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11569

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.