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  4. CVE 2026 66758 gimp integer overflow in file fits plugin causes
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Back to active CVEs
High · CVSS 7.8CVE-2026-66758

Gimp: integer overflow in file-fits plugin causes a heap-based buffer overflow on crafted fits imagesCVE-2026-66758

Answer in brief

CVE-2026-66758 records a High severity (CVSS 7.8) vulnerability in Gimp: integer overflow in file-fits plugin causes a heap-based buffer overflow on crafted fits images. The current sources do not mark it as known exploited. The current feed maps GNOME/gimp (generic), Red Hat/gimp (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 27, 2026Updated Nov 2, 2026Source checked Nov 4, 2026First seen by HOL Aug 5, 2026Material review Nov 2, 2026
Upstream Advisory

Record context

Vulnerability class
RCE
EPSS
Not reported
CWE IDs
CWE-190
Source
CVE List V5
Source checked
Nov 4, 2026
References
8 linked sources
Open source record

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
8 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps GNOME/gimp (generic), Red Hat/gimp (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:gimp:gimp:3.0.8:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:gimp:gimp:3.2.4:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
GNOME/gimpgeneric*Not reported
Red Hat/gimpgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for GNOME/gimp, Red Hat/gimp.
  2. 2Review the reported fix. Source-reported workaround: To mitigate this vulnerability, do not open FITS files from untrusted sources with GIMP.

Evidence timeline and material changes

  1. Published upstream

    Jul 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • Source referencegitlab.gnome.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.