{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-93421",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-17T20:57:18.984Z",
        "datePublished": "2026-09-23T18:59:52.637Z",
        "dateUpdated": "2026-09-23T19:41:34.966Z"
    },
    "containers": {
        "cna": {
            "title": "Mesop: Unauthenticated ANSI Escape Sequence Injection in CSP Reporting Endpoint",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-117",
                            "lang": "en",
                            "description": "CWE-117: Improper Output Neutralization for Logs",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-150",
                            "lang": "en",
                            "description": "CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "LOW",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/mesop-dev/mesop/security/advisories/GHSA-g7f6-rxc4-qhph",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/mesop-dev/mesop/security/advisories/GHSA-g7f6-rxc4-qhph"
                },
                {
                    "name": "https://github.com/mesop-dev/mesop/pull/1397",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mesop-dev/mesop/pull/1397"
                },
                {
                    "name": "https://github.com/mesop-dev/mesop/commit/f38c42a1d3eba246941ef8d7f645072d53c58785",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mesop-dev/mesop/commit/f38c42a1d3eba246941ef8d7f645072d53c58785"
                },
                {
                    "name": "https://github.com/mesop-dev/mesop/releases/tag/v1.3.4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/mesop-dev/mesop/releases/tag/v1.3.4"
                }
            ],
            "affected": [
                {
                    "vendor": "mesop-dev",
                    "product": "mesop",
                    "versions": [
                        {
                            "version": "< 1.3.4",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-23T18:59:52.637Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Mesop is a Python-based UI framework that allows users to build web applications. Prior to 1.3.4, the unauthenticated /__csp__ endpoint passes attacker-controlled document-uri, blocked-uri, and violated-directive values to the csp_report handler in mesop/server/static_file_serving.py, which prints them to standard output without neutralizing terminal control sequences. When an operator views the resulting logs in an ANSI-capable terminal, injected ANSI or VT100 sequences can clear or reposition the display, hide text, or present forged messages, reducing the integrity of monitoring and incident-response output. This issue is fixed in version 1.3.4."
                }
            ],
            "source": {
                "advisory": "GHSA-g7f6-rxc4-qhph",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-23T19:25:37.624256Z",
                                "id": "CVE-2026-93421",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "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": "2026-09-23T19:41:34.966Z"
                }
            }
        ]
    }
}