CVE-2026-66758

Full vulnerability record from the local CVENow database.
Description

A flaw was found in the file-fits plugin in GIMP. When processing a FITS image file, the plugin calculates memory allocation sizes using signed 32-bit integers for width and height. If a crafted file sets both values to large values, their product exceeds 2^31 and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when cfitsio subsequently writes a full row of pixels in the buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.
Severity
HIGH
CVSS score
7.8 (v3.1)
Vulnerability status
Modified
Source identifier
[email protected]
Published
2026-07-27 19:17:23.613000
Last modified
2026-11-02 10:17:12.587000
View original CVE JSON
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  "id": "CVE-2026-66758",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-27T19:17:23.613",
  "lastModified": "2026-11-02T10:17:12.587",
  "vulnStatus": "Modified",
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}