What’s Vulnerable › Vulnerabilities

CVE-2026-74243: Quay: unauthenticated secscan notification endpoint in quay when psk is unset

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-14 · updated 2026-08-20
• Weakness: CWE-306

Description

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.

Affected products

• Red Hat OpenShift Update Service: all versions
• Red Hat Quay 3: 3.0.0

References

• https://access.redhat.com/security/cve/CVE-2026-74243
• https://bugzilla.redhat.com/show_bug.cgi?id=2516142

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