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vuln-cve/data/2026/96xxx/CVE-2026-96276.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-96276",
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"state": "PUBLISHED",
"assignerShortName": "redhat",
"dateReserved": "2026-09-22T20:42:35.875Z",
"datePublished": "2026-09-23T15:01:49.657Z",
"dateUpdated": "2026-11-06T02:14:12.106Z"
},
"containers": {
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"title": "Flatpak: flatpak: arbitrary write in host context via flatpak build-init",
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
"version": "3.1"
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"descriptions": [
{
"lang": "en",
"value": "If a malicious SDK container declares an extension point with a crafted `directory` path, and a developer runs `flatpak build-init --writable-sdk --sdk-extension` with that SDK, attacker-chosen files could be written outside the working directory, since the target path is resolved via a function that allows `..` traversal."
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"url": "https://access.redhat.com/security/cve/CVE-2026-96276",
"tags": [
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},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2539418",
"name": "RHBZ#2539418",
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{
"url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-8qxj-x646-phcm"
}
],
"datePublic": "2026-08-11T00:00:00.000Z",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-22",
"description": "Improper Limitation of a Pathname to a Restricted Directory",
"lang": "en",
"type": "CWE"
}
]
}
],
"x_redhatCweChain": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory",
"workarounds": [
{
"lang": "en",
"value": "Avoid using an non-trusted SDK for development/compilation."
}
],
"timeline": [
{
"lang": "en",
"time": "2026-08-11T00:00:00.000Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-08-11T00:00:00.000Z",
"value": "Made public."
}
],
"credits": [
{
"lang": "en",
"value": "Upstream acknowledges Sebastian Wick as the original reporter."
}
],
"providerMetadata": {
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"shortName": "redhat",
"dateUpdated": "2026-11-06T02:14:12.106Z"
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"adp": [
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
}
},
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-23T15:28:10.393280Z",
"id": "CVE-2026-96276",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
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"dateUpdated": "2026-09-23T15:28:23.421Z"
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}