CVE-2026-106111: ImageSharp: EXR ZIP decoder can expose stale allocator data after a short inflate

A crafted ZIP-compressed OpenEXR image can return stale memory from a prior ImageSharp operation as decoded pixels. The ZIP decoder accepts a non-empty inflate result shorter than the EXR block’s required size, then the EXR decoder reads the full expected block.

This is a process-local, cross-operation information-disclosure defect. It is relevant when an application uses the shared Configuration.Default allocator for separate image operations and exposes pixels or output derived from a later attacker-controlled EXR decode. Whether that creates a network attack path depends on the host application.

No active exploitation is known.