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vuln-cve/data/2026/93xxx/CVE-2026-93421.json
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{
"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"
}
}
]
}
}