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        "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": "2026-09-23T15:28:23.421Z"
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    "containers": {
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            "title": "Flatpak: flatpak: arbitrary write in host context via flatpak build-init",
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                        "content": {
                            "value": "Moderate",
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                        "type": "Red Hat severity rating"
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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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            ],
            "affected": [
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "unknown",
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                    "product": "Red Hat Enterprise Linux 7",
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                    "product": "Red Hat Enterprise Linux 8",
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                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:8"
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                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "unknown",
                    "cpes": [
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                    "name": "RHBZ#2539418",
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                        "x_refsource_REDHAT"
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                {
                    "url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-8qxj-x646-phcm"
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            ],
            "datePublic": "2026-08-11T00:00:00.000Z",
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                {
                    "descriptions": [
                        {
                            "cweId": "CWE-22",
                            "description": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
                            "lang": "en",
                            "type": "CWE"
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                    ]
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            ],
            "x_redhatCweChain": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
            "workarounds": [
                {
                    "lang": "en",
                    "value": "Fixed in v1.18.1. 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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        "adp": [
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 9.8,
                            "attackVector": "NETWORK",
                            "baseSeverity": "CRITICAL",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-23T15:28:10.393280Z",
                                "id": "CVE-2026-96276",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
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                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
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