{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53503",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-09T17:05:25.059Z",
        "datePublished": "2026-07-31T18:54:20.747Z",
        "dateUpdated": "2026-07-31T21:39:35.108Z"
    },
    "containers": {
        "cna": {
            "title": "Thumbor convolution filter allows divide-by-zero in C extension leading to remote DoS",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-20",
                            "lang": "en",
                            "description": "CWE-20: Improper Input Validation",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-369",
                            "lang": "en",
                            "description": "CWE-369: Divide By Zero",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/thumbor/thumbor/security/advisories/GHSA-cqjp-jf4r-h5q9",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/thumbor/thumbor/security/advisories/GHSA-cqjp-jf4r-h5q9"
                },
                {
                    "name": "https://github.com/thumbor/thumbor/commit/447e192e3fb92e64c12e5354a56a4a7133f69d73",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/thumbor/thumbor/commit/447e192e3fb92e64c12e5354a56a4a7133f69d73"
                },
                {
                    "name": "https://github.com/thumbor/thumbor/releases/tag/7.8.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/thumbor/thumbor/releases/tag/7.8.0"
                }
            ],
            "affected": [
                {
                    "vendor": "thumbor",
                    "product": "thumbor",
                    "versions": [
                        {
                            "version": "< 7.8.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-31T18:54:20.747Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution(<matrix>, <columns>, <should_normalize>) filter passes the user-controlled <columns> value to a C extension (thumbor/ext/filters/_convolution.c) where it is used as a divisor (for % and /) without validating columns > 0. When columns=0, the C code triggers undefined behavior; on x86_64 this reliably results in a fatal divide-by-zero trap (SIGFPE) and crashes the Thumbor process, causing a remote denial of service. This issue is fixed in 7.8.0."
                }
            ],
            "source": {
                "advisory": "GHSA-cqjp-jf4r-h5q9",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/thumbor/thumbor/security/advisories/GHSA-cqjp-jf4r-h5q9",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-31T20:14:06.472673Z",
                                "id": "CVE-2026-53503",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "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": "2026-07-31T21:39:35.108Z"
                }
            }
        ]
    }
}