Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-66758
GNOME GIMP — Gimp: integer overflow in file-fits plugin causes a heap-based buffer overflow on crafted fits images
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L N R U H H H 7.8 .0030 20.2 —
AFFECTED
Product Versions Fixed
GIMP unspecified —
Red Hat Enterprise Linux 8 unspecified 8100020260824165450.4c9c024f
Red Hat Enterprise Linux 9 unspecified 2:3.0.4-4.el9_8.9
Red Hat Enterprise Linux 9.6 Extended Update Support unspecified 2:2.99.8-4.el9_6.20
Red Hat Enterprise Linux 6 unspecified —
Red Hat Enterprise Linux 7 unspecified —
TIMELINE
Jul 27 EXPLOIT PUBLISHED — CVE-2026-66758 (GNOME GIMP). Public exploit reference added.
Jul 27 Reserved by redhat
Jul 27 Published (CNA: redhat)
Aug 7 EXPLOIT PUBLISHED — CVE-2026-66758 (GNOME GIMP). Public exploit reference added.
Sep 2 EXPLOIT PUBLISHED — CVE-2026-66758 (GNOME GIMP). Public exploit reference added.
Sep 30 EXPLOIT PUBLISHED — CVE-2026-66758 (GNOME GIMP). Public exploit reference added.
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.
Lifecycle
Complete event history — 6 events, chronological
| Date | Event | Detail |
|---|
| July 27, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-66758 (GNOME GIMP). Public exploit reference added. |
| July 27, 2026 | Reserved | Reserved by redhat |
| July 27, 2026 | Published | Published (CNA: redhat) |
| August 7, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-66758 (GNOME GIMP). Public exploit reference added. |
| September 2, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-66758 (GNOME GIMP). Public exploit reference added. |
| September 30, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-66758 (GNOME GIMP). Public exploit reference added. |
Affected
Affected products and packages — 6 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| GNOME | GIMP | — | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | 8100020260824165450.4c9c024f |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | 2:3.0.4-4.el9_8.9 |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | — | 2:2.99.8-4.el9_6.20 |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-66758 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
