# Quay: mirror-registry: ssrf: repo-level mirror accepts external_reference without url validation

CVE record · `CVE-2026-15927`

- **Identifiers:** `CVE-2026-15927`
- **State:** Confirmed
- **Severity:** CVSS 6.8 Medium
- **Critical:** No
- **CNA:** redhat
- **Weakness (CWE):** [CWE-918](https://cwe.mitre.org/data/definitions/918.html)
- **Tags:** [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.md)
- **Technologies:** [Red Hat Quay 3.10](https://agentprime.io/advisories/technology/red-hat-quay-3-10.md) · [Red Hat Quay 3.12](https://agentprime.io/advisories/technology/red-hat-quay-3-12.md) · [Red Hat Quay 3.14](https://agentprime.io/advisories/technology/red-hat-quay-3-14.md) · [Red Hat Quay 3.15](https://agentprime.io/advisories/technology/red-hat-quay-3-15.md) · [Red Hat Quay 3.16](https://agentprime.io/advisories/technology/red-hat-quay-3-16.md) · [Red Hat Quay 3.17](https://agentprime.io/advisories/technology/red-hat-quay-3-17.md) · [Red Hat Quay 3.9](https://agentprime.io/advisories/technology/red-hat-quay-3-9.md) · [mirror registry for Red Hat OpenShift 2](https://agentprime.io/advisories/technology/mirror-registry-for-red-hat-openshift-2.md)
- **Published:** 21 Jul 2026
- **Updated:** 1 Nov 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: redhat) at 21 Jul 2026, 04:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Red Hat. Product: Red Hat Quay 3.10.
  - unaffected: `1786395065 to before *` (rpm)
  - Other versions: affected
  - Package name: `quay/quay-rhel8`
  - Collection: `https://catalog.redhat.com/software/containers/`
- Vendor: Red Hat. Product: Red Hat Quay 3.12.
  - unaffected: `1786170635 to before *` (rpm)
  - Other versions: affected
  - Package name: `quay/quay-rhel8`
  - Collection: `https://catalog.redhat.com/software/containers/`
- Vendor: Red Hat. Product: Red Hat Quay 3.14.
  - unaffected: `1788593843 to before *` (rpm)
  - Other versions: affected
  - Package name: `quay/quay-rhel8`
  - Collection: `https://catalog.redhat.com/software/containers/`
- Vendor: Red Hat. Product: Red Hat Quay 3.15.
  - unaffected: `1788191755 to before *` (rpm)
  - Other versions: affected
  - Package name: `quay/quay-rhel8`
  - Collection: `https://catalog.redhat.com/software/containers/`
- Vendor: Red Hat. Product: Red Hat Quay 3.16.
  - unaffected: `1789563753 to before *` (rpm)
  - Other versions: affected
  - Package name: `quay/quay-rhel9`
  - Collection: `https://catalog.redhat.com/software/containers/`
- Vendor: Red Hat. Product: Red Hat Quay 3.17.
  - unaffected: `1786181981 to before *` (rpm)
  - Other versions: affected
  - Package name: `quay/quay-rhel9`
  - Collection: `https://catalog.redhat.com/software/containers/`
- Vendor: Red Hat. Product: Red Hat Quay 3.9.
  - unaffected: `1785950004 to before *` (rpm)
  - Other versions: affected
  - Package name: `quay/quay-rhel8`
  - Collection: `https://catalog.redhat.com/software/containers/`
- Vendor: Red Hat. Product: mirror registry for Red Hat OpenShift 2.
  - No versions given
  - Other versions: affected
  - Package name: `openshift/mirror-registry-rhel8`
  - Collection: `https://access.redhat.com/downloads/content/package-browser/`

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 6.8 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N`, from CNA (redhat)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0060, the 49th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 21 Jul 2026, 04:45 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-15927)

## Sources

- [CVE List: CVE-2026-15927](https://www.cve.org/CVERecord?id=CVE-2026-15927)
- [NVD: CVE-2026-15927](https://nvd.nist.gov/vuln/detail/CVE-2026-15927)

### References from the CNA

- <https://access.redhat.com/errata/RHSA-2026:50931> (vendor-advisory, redhat)
- <https://access.redhat.com/errata/RHSA-2026:52968> (vendor-advisory, redhat)
- <https://access.redhat.com/errata/RHSA-2026:53520> (vendor-advisory, redhat)
- <https://access.redhat.com/errata/RHSA-2026:54395> (vendor-advisory, redhat)
- <https://access.redhat.com/errata/RHSA-2026:63307> (vendor-advisory, redhat)
- <https://access.redhat.com/errata/RHSA-2026:69255> (vendor-advisory, redhat)
- <https://access.redhat.com/errata/RHSA-2026:70267> (vendor-advisory, redhat)
- <https://access.redhat.com/security/cve/CVE-2026-15927> (vdb-entry, redhat)
- <https://bugzilla.redhat.com/show_bug.cgi?id=2501256> (issue-tracking, redhat)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-15927>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-15927/>. Everything for agents: <https://agentprime.io/llms.txt>.