{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-96807",
        "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "state": "PUBLISHED",
        "assignerShortName": "mitre",
        "dateReserved": "2026-09-23T16:54:16.535Z",
        "datePublished": "2026-09-23T16:54:16.931Z",
        "dateUpdated": "2026-09-23T16:54:16.931Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "platforms": [
                        "Linux"
                    ],
                    "product": "Flatpak",
                    "programFiles": [
                        "common/flatpak-run.c"
                    ],
                    "programRoutines": [
                        {
                            "name": "regenerate_ld_cache"
                        }
                    ],
                    "repo": "https://github.com/flatpak/flatpak",
                    "vendor": "Flatpak",
                    "versions": [
                        {
                            "lessThan": "1.18.1",
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not attacker controlled, making this hard to exploit."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "LOW",
                        "baseScore": 4,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L",
                        "version": "3.1"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-61",
                            "description": "CWE-61 UNIX Symbolic Link (Symlink) Following",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
                "shortName": "mitre",
                "dateUpdated": "2026-09-23T16:54:16.931Z"
            },
            "references": [
                {
                    "url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-99wv-m8rp-g58x"
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
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                            "type": "text/html",
                            "value": "<p>The issue has been fixed in version 1.18.1 by commits:</p>\n<ul>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https://github.com/flatpak/flatpak/commit/e13dfeda330625d2fecc3a54672dfd4dc9c83a5c\">e13dfed</a> \"common: Fix return value and typos in flatpak_switch_symlink_and_remove\"</li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https://github.com/flatpak/flatpak/commit/f6c8fb5fdb3737e2f45068afe12c4bf1d808fd55\">f6c8fb5</a> \"common: Use fd-based operations in flatpak_switch_symlink_and_remove\"</li>\n<li><a target=\"_blank\" rel=\"noopener noreferrer\" href=\"https://github.com/flatpak/flatpak/commit/76c9296b6780ca67f44cf67f0823f086d692a592\">76c9296</a> \"run: Harden regenerate_ld_cache against symlink attacks\"</li>\n</ul>\n<p>For LTS operating system distributions, backports of these changes are available in the <code>flatpak-1.16.x</code>\n branch. Please note that cherry-picked libglnx changes \"chase: Add \ninternal glnx_chaseat_full for a strategic callback\" and \"chase: Add \nglnx_chase_and_mkdirat\" are also required.</p>"
                        }
                    ],
                    "value": "The issue has been fixed in version 1.18.1 by commits:\n\n\n\n  *   e13dfed https://github.com/flatpak/flatpak/commit/e13dfeda330625d2fecc3a54672dfd4dc9c83a5c  \"common: Fix return value and typos in flatpak_switch_symlink_and_remove\"\n\n  *   f6c8fb5 https://github.com/flatpak/flatpak/commit/f6c8fb5fdb3737e2f45068afe12c4bf1d808fd55  \"common: Use fd-based operations in flatpak_switch_symlink_and_remove\"\n\n  *   76c9296 https://github.com/flatpak/flatpak/commit/76c9296b6780ca67f44cf67f0823f086d692a592  \"run: Harden regenerate_ld_cache against symlink attacks\"\n\n\n\n\nFor LTS operating system distributions, backports of these changes are available in the flatpak-1.16.x\n branch. Please note that cherry-picked libglnx changes \"chase: Add \ninternal glnx_chaseat_full for a strategic callback\" and \"chase: Add \nglnx_chase_and_mkdirat\" are also required."
                }
            ],
            "x_generator": {
                "engine": "CVE-Request-form 0.0.1"
            },
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "1.18.1"
                                }
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                }
            ]
        }
    }
}