🟡 Medium | Source: Microsoft Security Response Center
CVE-2026-58011 is an out-of-bounds read vulnerability in GLib, a core open-source utility library widely used across Linux-based systems and cloud workloads. The flaw exists in the date/time parsing code and can be triggered by supplying an invalid GDateTime object, potentially allowing an attacker to read memory beyond its intended boundaries. While Microsoft has published this advisory via the MSRC, the impact extends to any Azure or Linux-based environment relying on GLib.
Security Architect’s Take: Identify any Azure Linux VMs, containers, or managed services running workloads that depend on GLib and prioritise patching to a fixed version once available. Review whether untrusted input can reach GDateTime parsing logic in your applications, as this represents the primary attack surface.
Original advisory: CVE-2026-58011 Glib: out-of-bounds read in glib/gdatetime.c:g_date_time_get_ymd via invalid gdatetime