{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-73639",
        "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "state": "PUBLISHED",
        "assignerShortName": "CPANSec",
        "dateReserved": "2026-08-13T12:51:42.912Z",
        "datePublished": "2026-09-17T21:18:59.207Z",
        "dateUpdated": "2026-09-22T18:27:56.365Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://cpan.org/modules",
                    "defaultStatus": "unaffected",
                    "modules": [
                        "Imager::File::PNG"
                    ],
                    "packageName": "Imager-File-PNG",
                    "packageURL": "pkg:cpan/Imager-File-PNG",
                    "programFiles": [
                        "impng.c"
                    ],
                    "programRoutines": [
                        {
                            "name": "read_direct8"
                        }
                    ],
                    "repo": "https://github.com/tonycoz/imager",
                    "versions": [
                        {
                            "lessThan": "1.004",
                            "status": "affected",
                            "version": "1.003",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "collectionURL": "https://cpan.org/modules",
                    "defaultStatus": "unaffected",
                    "modules": [
                        "Imager::File::PNG"
                    ],
                    "packageName": "Imager",
                    "packageURL": "pkg:cpan/Imager",
                    "programFiles": [
                        "PNG/impng.c"
                    ],
                    "programRoutines": [
                        {
                            "name": "read_direct8"
                        }
                    ],
                    "repo": "https://github.com/tonycoz/imager",
                    "versions": [
                        {
                            "lessThan": "1.035",
                            "status": "affected",
                            "version": "1.034",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Alexander Bluhm (bluhm)"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Imager::File::PNG versions from 1.003 before 1.004 for Perl write past the end of the row buffer reading a PNG with a tRNS transparency chunk in read_direct8.\n\nWith a tRNS chunk, read_direct8() adds an alpha channel to the image it creates but still sizes the row buffer from the original channel count. libpng expands the transparency into that extra channel, so png_read_row() fills one channel more than the buffer holds, at one byte per sample, and writes width bytes past the end of the allocation. Palette images go to read_paletted() and 16-bit images to read_direct16(), which sizes its buffer from png_get_rowbytes() and allocates enough for the expanded row.\n\nThe same reader ships bundled in the Imager distribution.\n\nReading an attacker-supplied PNG through Imager->read() corrupts the heap, which can crash the process."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-787",
                            "description": "CWE-787 Out-of-bounds Write",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
                "shortName": "CPANSec",
                "dateUpdated": "2026-09-17T21:18:59.207Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://github.com/tonycoz/imager/security/advisories/GHSA-jhx5-34j8-9g88"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/tonycoz/imager/commit/d973bd7e8843f084e8071caa24b89545c88b1e4b.patch"
                },
                {
                    "tags": [
                        "issue-tracking"
                    ],
                    "url": "https://github.com/tonycoz/imager/pull/567"
                },
                {
                    "tags": [
                        "release-notes"
                    ],
                    "url": "https://metacpan.org/release/TONYC/Imager-File-PNG-1.004/changes"
                },
                {
                    "tags": [
                        "release-notes"
                    ],
                    "url": "https://metacpan.org/release/TONYC/Imager-1.035/changes"
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "Upgrade to Imager-File-PNG 1.004 or later, or to Imager 1.035 or later if the bundled copy is in use."
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "timeline": [
                {
                    "lang": "en",
                    "time": "2026-08-19T00:00:00.000Z",
                    "value": "Imager-File-PNG 1.004 and Imager 1.035 released with fix."
                }
            ],
            "title": "Imager::File::PNG versions from 1.003 before 1.004 for Perl write past the end of the row buffer reading a PNG with a tRNS transparency chunk in read_direct8",
            "x_generator": {
                "engine": "cpansec-cna-tool 0.1"
            }
        },
        "adp": [
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "http://www.openwall.com/lists/oss-security/2026/09/17/6"
                    }
                ],
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2026-09-18T00:18:32.862Z"
                }
            },
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 9.1,
                            "attackVector": "NETWORK",
                            "baseSeverity": "CRITICAL",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                            "integrityImpact": "NONE",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-22T18:04:27.077498Z",
                                "id": "CVE-2026-73639",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-22T18:27:56.365Z"
                }
            }
        ]
    }
}