CVE-2026-49762 is a denial-of-service vulnerability in a Version parsing module used within Azure, where unbounded integer parsing allows an attacker to trigger excessive CPU and memory consumption. By sending specially crafted version strings, an attacker could exhaust server resources and render affected services unavailable. This matters because DoS vulnerabilities in shared cloud infrastructure can have a broad blast radius, potentially impacting multiple tenants or dependent services.

Security Architect’s Take: Review whether any Azure services or workloads in your environment rely on the affected Version module and apply Microsoft’s patch or mitigations promptly. Additionally, consider implementing rate limiting and input validation at API gateways to reduce exposure to resource-exhaustion attacks whilst patches are deployed.

Original advisory: CVE-2026-49762 Unbounded integer parsing in the Version module enables CPU and memory exhaustion denial of service