CVE-2026-18309

GIMP APNG File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of APNG files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29401.

Database specific

{
    "cna_assigner": "zdi",
    "cwe_ids": [
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18309.json"
}

References

Affected packages

Git / github.com/gnome/gimp

Affected ranges

Type

GIT

Repo

https://github.com/gnome/gimp

Events

Introduced

476407cd1ba693501c435b6200f877e1ff278627

Last Affected

476407cd1ba693501c435b6200f877e1ff278627

Database specific

Show details

{
    "cpe": "cpe:2.3:a:gimp:gimp:3.2.2:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "3.2.2"
        },
        {
            "last_affected": "3.2.2"
        }
    ],
    "source": "CPE_STRING"
}

Type

GIT

Repo

https://gitlab.gnome.org/gnome/gimp

Events

Introduced

476407cd1ba693501c435b6200f877e1ff278627

Fixed

c760c8309d18bdf5259f1e04ced0779462c7c636

Database specific

Show details

{
    "cpe": "cpe:2.3:a:gimp:gimp:3.2.2:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "3.2.2"
        },
        {
            "last_affected": "3.2.2"
        }
    ],
    "source": [
        "CPE_STRING",
        "REFERENCES"
    ]
}

Affected versions

3.*

3.2.2

Other

GIMP_3_2_2-windows-fixes

GIMP_3_2_4

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18309.json"

vanir_signatures

[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "214099285325909051919589032658854339234",
                "272285134470091790670482505131128739610",
                "40437507703903650301706907186580696836",
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                "132831245766260094413729746561787646870",
                "56216504231875752179493170685069273148",
                "2389578383247589774440278086066444516",
                "238001609428312977074709103133107125363"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-18309-802b3d12",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://gitlab.gnome.org/gnome/gimp@c760c8309d18bdf5259f1e04ced0779462c7c636",
        "target": {
            "file": "plug-ins/common/file-png.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "91968381148664342552946736740685220716",
            "length": 5410
        },
        "id": "CVE-2026-18309-a3938d7d",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://gitlab.gnome.org/gnome/gimp@c760c8309d18bdf5259f1e04ced0779462c7c636",
        "target": {
            "file": "plug-ins/common/file-png.c",
            "function": "load_apng_image"
        }
    }
]

vanir_signatures_modified

"2026-09-10T08:11:41Z"