Is CVE-2026-66757 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-66757?

CVE-2026-66757 has a CVSS v3 severity of MEDIUM (5.5).

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CVE-2026-66757

Description

A flaw was found in the file-sgi plugin in GIMP. When processing an RLE-compressed SGI image, the plugin allocates memory for a row table. The image header dimensions (ysize and zsize) are read as 16-bit unsigned integers. If a crafted file sets both dimensions to their maximum value (65535), the multiplication ysize * zsize overflows the standard 32-bit int boundary before being passed to calloc. This integer overflow issue results in undefined behavior, aborting the plugin and causing a denial of service.