CVE-2026-32591
MediumCVSS 5.2Exploitation Probability (EPSS)
Low risk26th percentile - higher than 26% of all known CVEs
Summary
In Red Hat Quay, the proxy cache configuration feature does not verify that the specified upstream registry hostname points to a legitimate external service. An organization administrator can supply a crafted hostname, forcing the Quay server to make requests to internal network services, cloud infrastructure endpoints, or other resources that should not be accessible from the Quay application.
Risk Assessment
An attacker with organization administrator privileges can exploit this vulnerability to scan the internal network, access sensitive data, or launch attacks against other internal systems.
Recommendation
It is recommended to update Red Hat Quay to a patched version and implement hostname validation in the proxy cache configuration.
Other vulnerabilities in Red Hat Quay
See all- CVE-2026-74247Medium
In Red Hat Quay, a user with FEATURE_BUILD_SUPPORT enabled and repository write access can exploit an SSRF vulnerability within the build API by providing a malicious URL, causing the builder to make requests to internal network addresses.
- CVE-2026-74245Medium
In Red Hat Quay's exported logs feature, an unauthenticated attacker with a valid file ID could download exported action logs without proper authorization. File IDs can be intercepted from plaintext email or webhook callbacks.
- CVE-2026-74244Medium
In Red Hat Quay's Stripe billing webhook handler, an unauthenticated attacker can forge billing events by sending crafted JSON requests to the /webhooks/stripe endpoint without validating the Stripe-Signature header.
- CVE-2026-74243Medium
In Red Hat Quay, when SECURITY_SCANNER_V4_PSK is not set, a remote unauthenticated attacker can send POST requests to the security scanner notification endpoint, allowing flooding of the notification queue and injection of path traversal characters into Clair API URL paths.
- CVE-2026-74242Medium
In Red Hat Quay, an administrator of any repository, by knowing or guessing a target notification's UUID, can read the notification configuration, including sensitive details like webhook URLs, Slack tokens, and email addresses. They can also trigger test notifications for another repository.
- CVE-2026-74241Medium
In Red Hat Quay's external LDAP authentication handling, when an LDAP referral is returned during authentication, the system does not properly escape the username input. This allows an attacker to inject LDAP filter metacharacters, enabling user-existence oracle attacks at the referral DN.
- CVE-2026-74240Medium
In Red Hat Quay's JWT validation for federated robot accounts and SSO authentication, multiple issues related to audience verification and enforcement of azp and sub claims were identified. An attacker with a validly-signed token from the same identity provider could bypass configured security restrictions.
- CVE-2026-16910Medium
In Red Hat Quay, the Slack and generic webhook notification handlers do not validate URLs against SSRF. A repository administrator can force the Quay worker to send POST requests to internal network addresses or cloud endpoints.
- CVE-2026-15927Medium
SSRF vulnerability in Red Hat Quay's repository-level mirror configuration. A repository administrator can supply a crafted hostname causing the Quay mirror worker to make requests to internal network services.
- CVE-2026-32590High
A flaw was found in Red Hat Quay's handling of resumable container image layer uploads. The upload process stores intermediate data in the database using a format that, if tampered with, could allow an attacker to execute arbitrary code on the Quay server.
Original NVD description (English source)
A flaw was found in Red Hat Quay's Proxy Cache configuration feature. When an organization administrator configures an upstream registry for proxy caching, Quay makes a network connection to the specified registry hostname without verifying that it points to a legitimate external service. An attacker with organization administrator privileges could supply a crafted hostname to force the Quay server to make requests to internal network services, cloud infrastructure endpoints, or other resources that should not be accessible from the Quay application.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

