Red Hat OpenShift Update Service/Quay Security Scanner Notification Endpoint path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in Red Hat OpenShift Update Service and Quay. This vulnerability affects unknown code of the component Security Scanner Notification Endpoint. Such manipulation leads to path traversal. This vulnerability is referenced as CVE-2026-74243. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Red Hat OpenShift Update Service and Quay (affected version not known). It has been rated as critical. Affected by this issue is some unknown functionality of the component Security Scanner Notification Endpoint. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity, and availability. CVE summarizes:

A flaw was found in Red Hat Quay. When the SECURITY_SCANNER_V4_PSK (pre-shared key) is not set, a remote unauthenticated attacker can send POST requests to the security scanner notification endpoint. This allows the attacker to flood the notification queue and inject path traversal characters into Clair API URL paths. The primary consequence is worker resource exhaustion and blind path manipulation on the configured Clair host, potentially leading to a denial of service.

The advisory is shared for download at access.redhat.com. This vulnerability is handled as CVE-2026-74243 since 08/14/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/15/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Virtualization Software

Vendor

• Red Hat

Name

• OpenShift Update Service
• Quay

License

• open-source

Website

• Vendor: https://www.redhat.com/

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