A flaw was found in the file-icns plugin in GIMP. (CVE-2026-66759)
Description
A vulnerability in the file-icns plugin of GIMP allows an out-of-bounds read when processing crafted ICNS image files with truncated mask resources. This flaw can lead to information disclosure of heap memory or cause a crash resulting in denial of service. The issue affects multiple specific versions of GIMP. The vulnerability has a CVSS score of 7.1, indicating a medium severity level.
CVSS v3.1
Score 7.1high
Affected software
pkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/gimp?arch=source&distro=stonkingpkg:deb/ubuntu/gimp?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The file-icns plugin in GIMP contains a flaw where, during the application of a decompressed mask in ICNS image processing, the plugin reads beyond the allocated buffer if the mask resource is truncated. Specifically, the icns_decompress function does not verify if the cursor exceeds the resource size, leading to an out-of-bounds read. This can disclose heap memory contents as alpha channel pixel values or cause a crash if unmapped memory is accessed, resulting in denial of service.
Potential Impact
Successful exploitation can disclose heap memory contents, potentially leaking sensitive information, or cause the application to crash, resulting in denial of service. There is no indication of code execution or integrity impact. The vulnerability requires local access with low complexity and no privileges but user interaction is required.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid opening untrusted or malformed ICNS image files with GIMP to mitigate risk.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-66759
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f5ae2cdf04f656662810
Added to database: 10/17/2026, 22:24:46 UTC
Last enriched: 10/18/2026, 00:06:12 UTC
Last updated: 10/18/2026, 00:06:12 UTC
Views: 2
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