🛡️ CVE-2026-15927

🟡 CVSS 6.8 — Medium ✅ No Known Exploit CWE-918 NVD
6.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A flaw was found in Red Hat Quay's repository-level mirror configuration

feature. The POST and PUT handlers in endpoints/api/mirror.py accept an

external_reference parameter without SSRF validation, unlike the

organization-level mirror handlers which apply validate_external_registry_url().

A repository administrator can supply a crafted hostname that causes the Quay

mirror worker to make requests via Skopeo to internal network services, cloud

metadata endpoints, or other resources not intended to be reachable from the

Quay application.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-15927 is classified as CWE-918: Server-Side Request Forgery (SSRF). The server fetches a URL supplied by the caller, which can be pointed at internal systems it alone can reach.

Affected software

CVE-2026-15927 is recorded against 1 package.

  • unknown

Timeline and source

Published on 21 July 2026 and last revised on 10 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

access.redhat.com
access.redhat.com
access.redhat.com
bugzilla.redhat.com

Details

Severity MEDIUM
CVSS Score 6.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
CWE CWE-918
Public Exploit ✅ No
Source NVD
Published 2026-07-21
Updated 2026-08-11
Modified 2026-08-10
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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