{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-67447",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-29T15:07:24.992Z",
        "datePublished": "2026-08-20T21:15:06.567Z",
        "dateUpdated": "2026-08-20T21:15:06.567Z"
    },
    "containers": {
        "cna": {
            "title": "Mailpit: SMTP DATA line reader buffers over-limit input before size enforcement",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-770",
                            "lang": "en",
                            "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "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:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/axllent/mailpit/security/advisories/GHSA-r553-m4fv-5v97",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/axllent/mailpit/security/advisories/GHSA-r553-m4fv-5v97"
                },
                {
                    "name": "https://github.com/axllent/mailpit/commit/8720c6bd8281fc00d458081908f1dbef8e59a98c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/axllent/mailpit/commit/8720c6bd8281fc00d458081908f1dbef8e59a98c"
                },
                {
                    "name": "https://github.com/axllent/mailpit/releases/tag/v1.30.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/axllent/mailpit/releases/tag/v1.30.5"
                }
            ],
            "affected": [
                {
                    "vendor": "axllent",
                    "product": "mailpit",
                    "versions": [
                        {
                            "version": ">= 1.30.0, < 1.30.5",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-20T21:15:06.567Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Mailpit is an email testing tool and API for developers. From 1.30.0 until 1.30.5, Mailpit's internal/smtpd/smtpd.go readData() function calls bufio.Reader.ReadBytes before applying the len(data)+len(line) size check to the completed SMTP DATA line against Server.MaxSize. An unauthenticated SMTP client can send a single line larger than the configured MaxMessageSize, causing the full line to be allocated before Mailpit returns the 552 5.3.4 rejection. This post-fix gap remains after normal multi-line DATA accumulation was bounded, and concurrent oversized lines can create substantial memory pressure beyond the configured message-size cap. This issue is fixed in version 1.30.5."
                }
            ],
            "source": {
                "advisory": "GHSA-r553-m4fv-5v97",
                "discovery": "UNKNOWN"
            }
        }
    }
}