Vulnerability-Lookup

CVE-2026-66758 (GCVE-0-2026-66758)

Vulnerability from cvelistv5 – Published: 2026-07-27 19:07 – Updated: 2026-07-27 19:07

Title

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

Summary

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

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

redhat

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-66758	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507475	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/gimp/-/issues/16528

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-07-07 00:00

Credits

Red Hat would like to thank Tristan Madani for reporting this issue.

Show details on NVD website

JSON

To clipboard

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          "product": "Red Hat Enterprise Linux 6",
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          "cpes": [
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          "cpes": [
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          "packageName": "gimp:2.8/gimp",
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      "descriptions": [
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          "descriptions": [
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      "providerMetadata": {
        "dateUpdated": "2026-07-27T19:07:12.789Z",
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      "references": [
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        },
        {
          "name": "RHBZ#2507475",
          "tags": [
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            "x_refsource_REDHAT"
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          "time": "2026-07-07T00:00:00.000Z",
          "value": "Made public."
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      ],
      "title": "Gimp: integer overflow in file-fits plugin causes a heap-based buffer overflow on crafted fits images",
      "workarounds": [
        {
          "lang": "en",
          "value": "To mitigate this vulnerability, do not open FITS files from untrusted sources with GIMP."
        }
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    "state": "PUBLISHED"
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}

GHSA-P2XC-G3QC-P2MQ

Vulnerability from github – Published: 2026-07-27 21:31 – Updated: 2026-07-27 21:31

Details

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-66758"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-27T19:17:23Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-p2xc-g3qc-p2mq",
  "modified": "2026-07-27T21:31:21Z",
  "published": "2026-07-27T21:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66758"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-66758"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507475"
    },
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      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/gimp/-/issues/16528"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-66758 (GCVE-0-2026-66758)

GHSA-P2XC-G3QC-P2MQ

Tags

Sightings

Nomenclature