{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97027", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-09-23T21:12:57.647Z", "datePublished": "2026-09-28T20:57:06.758Z", "dateUpdated": "2026-09-28T20:57:06.758Z"}, "containers": {"cna": {"title": "Flatpak: flatpak: denial of service via unsanitized keys in exported desktop entry / d-bus service files", "metrics": [{"other": {"content": {"value": "Low", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.6, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "Flatpak passes through arbitrary vendor-extension keys unmodified when exporting an application's Desktop Entry (.desktop) and D-Bus Service (.service) files, instead of validating against an allowlist. A malicious Flatpak app can use this to cause denial of service (e.g. forced application restart loops) or to influence host D-Bus/systemd activation behavior beyond what the sandbox is intended to permit."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "flatpak", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:10"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "flatpak", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:7"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "flatpak", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "flatpak", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-97027", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542683", "name": "RHBZ#2542683", "tags": ["issue-tracking", "x_refsource_REDHAT"]}, {"url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-v64f-hrwr-j4vh"}], "datePublic": "2026-09-28T13:33:58.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "description": "Improper Input Validation", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-20: Improper Input Validation", "workarounds": [{"lang": "en", "value": "Only install applications from trusted sources."}], "timeline": [{"lang": "en", "time": "2026-09-28T13:33:58.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-09-28T13:33:58.000Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Markus G\u00f6llnitz for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-09-28T20:57:06.758Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

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{"affected": [{"affectedData": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:10"], "defaultStatus": "affected", "packageName": "flatpak", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:7"], "defaultStatus": "affected", "packageName": "flatpak", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:8"], "defaultStatus": "affected", "packageName": "flatpak", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "affected", "packageName": "flatpak", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}], "source": "secalert@redhat.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Flatpak passes through arbitrary vendor-extension keys unmodified when exporting an application's Desktop Entry (.desktop) and D-Bus Service (.service) files, instead of validating against an allowlist. A malicious Flatpak app can use this to cause denial of service (e.g. forced application restart loops) or to influence host D-Bus/systemd activation behavior beyond what the sandbox is intended to permit."}], "id": "CVE-2026-97027", "lastModified": "2026-09-28T21:17:20.067", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.6, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Primary"}]}, "published": "2026-09-28T21:17:20.067", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-97027"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542683"}, {"source": "secalert@redhat.com", "url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-v64f-hrwr-j4vh"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "secalert@redhat.com", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Markus G\u00f6llnitz for reporting this issue.", "bugzilla": {"description": "flatpak: flatpak: Denial of service via unsanitized keys in exported Desktop Entry / D-Bus Service files", "id": "2542683", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542683"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-20", "details": ["Flatpak passes through arbitrary vendor-extension keys unmodified when exporting an application's Desktop Entry (.desktop) and D-Bus Service (.service) files, instead of validating against an allowlist. A malicious Flatpak app can use this to cause denial of service (e.g. forced application restart loops) or to influence host D-Bus/systemd activation behavior beyond what the sandbox is intended to permit."], "mitigation": {"lang": "en:us", "value": "Only install applications from trusted sources."}, "name": "CVE-2026-97027", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "flatpak", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "flatpak", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "flatpak", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-09-28T13:33:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97027\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97027\nhttps://github.com/flatpak/flatpak/security/advisories/GHSA-v64f-hrwr-j4vh"], "statement": "Red Hat estimates the CVSSv3.1 vector of CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L.\nExploitation requires a victim to install and run a malicious Flatpak application (UI:R), after which the unsanitized exported Desktop Entry / D-Bus Service keys take effect automatically with no additional attacker privileges or access complexity (AV:L, AC:L, PR:N). Because the exported files can influence D-Bus/systemd activation behavior on the host session outside the flatpak sandbox, this is treated as a scope change (S:C). No confidentiality or integrity impact is implied by the primary reported effect (C:N, I:N); the impact is limited to availability, via forced application restart loops or disrupted service activation (A:L).", "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "flatpak", "vendor": "flatpak"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}], "created": "2026-09-28T23:15:08.089850+00:00", "updated": "2026-09-29T13:20:13.327856+00:00", "vendors": ["flatpak", "flatpak$PRODUCT$flatpak", "redhat", "redhat$PRODUCT$enterprise_linux"]}