Vulnerability · Published Aug 14, 2026 · Assigned by redhat

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

Medium 6.5

In plain English

A medium-severity missing authentication in Red Hat OpenShift Update Service from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.5%top 59.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Red Hat	Red Hat OpenShift Update Service	see references
Red Hat	Red Hat Quay 3	see references
Red Hat	Red Hat Quay 3	see references

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References

https://access.redhat.com/security/cve/CVE-2026-74243 vdb-entry, x_refsource_REDHAT
RHBZ#2516142 issue-tracking, x_refsource_REDHAT