Gimp Gimp
CVE-2026-66758
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.
What this means for your business
- It affects Gimp. It matters if your company, or a supplier that handles your data, runs it.
- Code showing how to exploit it has been published, but real attacks have not been confirmed.
- An attacker can use it only with access to the machine itself, without a login, but only after tricking someone into an action such as opening a file or a link.
- FIRST's prediction model gives it a 0.4% chance of attack attempts being seen in the next 30 days, ranking above 27% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Gimp, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Fastnexa security experts
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Scoring
- CVSS
- 7.8 (v3.1)
- Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness
- CWE-190
- Assigned by
- secalert@redhat.com
Dates
- Published
- 2026-07-27
- Last modified
- 2026-09-02
- Sources
- NVD
Affected products
- Gimp Gimp3.0.8, 3.2.4
- Redhat Enterprise Linux6.0, 7.0, 8.0, 9.0
As listed in the NVD configuration data. Not a statement about your estate.