Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-74243

CVE-2026-74243HIGH

Red Hat Red Hat OpenShift Update Service — Quay: unauthenticated secscan notification endpoint in quay when psk is unset

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  L  H    8.2   .0046   38.0     —

AFFECTED
  Product                           Versions     Fixed
  Red Hat OpenShift Update Service  unspecified  —
  Red Hat Quay 3                    unspecified  —
  Red Hat Quay 3                    unspecified  —

TIMELINE
  Aug 14  Reserved by redhat
  Aug 14  Published (CNA: redhat)
  Aug 20  RESCORED — CVE-2026-74243 (Red Hat OpenShift Update Service). CVSS 6.5 → 8.2 (NVD).

CWE-306 · CNA: redhat · CVSS v3.1 · 2 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 14, 2026	Reserved	Reserved by redhat
August 14, 2026	Published	Published (CNA: redhat)
August 20, 2026	RESCORED	RESCORED — CVE-2026-74243 (Red Hat OpenShift Update Service). CVSS 6.5 → 8.2 (NVD).

Affected

Affected products and packages — 3 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Red Hat	Red Hat OpenShift Update Service	—	—	—
Red Hat	Red Hat Quay 3	—	—	—
Red Hat	Red Hat Quay 3	—	—	—

Weaknesses

CWE-306

References (2)

https://access.redhat.com/security/cve/CVE-2026-74243 [Vendor Advisory]
https://bugzilla.redhat.com/show_bug.cgi?id=2516142 [Issue Tracking, Vendor Advisory]

Authoritative record: CVE-2026-74243 at cve.org

Vendors: red hat

Weaknesses: CWE-306

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-74243 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.