{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-94422", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-09-21T15:32:06.674Z", "datePublished": "2026-10-02T13:54:10.589Z", "dateUpdated": "2026-10-02T16:51:40.902Z"}, "containers": {"cna": {"title": "xdg-dbus-proxy: message filtering bypass via reply serial allows sandbox escape", "descriptions": [{"lang": "en", "value": "An incorrect implementation of message filtering in xdg-dbus-proxy versions before 0.1.9 allows an attacker to bypass the intended message filtering on the D-Bus session bus by setting a reply serial number on non-reply messages. A malicious or compromised Flatpak app could use this to achieve arbitrary code execution outside its sandbox. xdg-dbus-proxy was designed to be part of the sandbox boundary for Flatpak, but it is released as a separate project and is sometimes used by other app frameworks such as Firejail."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-290", "description": "Authentication Bypass by Spoofing"}]}], "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}}, {"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE"}}], "affected": [{"packageName": "xdg-dbus-proxy", "collectionURL": "https://github.com/flatpak/xdg-dbus-proxy", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "0.1.9", "versionType": "semver", "status": "affected"}]}, {"vendor": "Fedora", "product": "Fedora", "packageName": "xdg-dbus-proxy", "collectionURL": "https://bodhi.fedoraproject.org/updates/?packages=xdg-dbus-proxy", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "0.1.9", "versionType": "semver", "status": "affected"}]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "xdg-dbus-proxy", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "xdg-dbus-proxy", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:10"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-94422", "tags": ["vendor-advisory"]}, {"url": "https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-2cgv-pwcq-wvpq", "tags": ["third-party-advisory"]}, {"url": "https://github.com/flatpak/xdg-dbus-proxy/commit/e5702fca4dba9600721921fbca2dbc39dc5ca400", "tags": ["patch"]}, {"url": "https://github.com/flatpak/xdg-dbus-proxy/commit/fc027f759316fb2a6c45648200b6f100202eb84e", "tags": ["patch"]}, {"url": "https://github.com/flatpak/xdg-dbus-proxy/commit/e4465a0dfe96da3b39929a30a1ac3a22b16223e3", "tags": ["patch"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542235", "tags": ["issue-tracking"]}], "credits": [{"lang": "en", "value": "refi64", "type": "reporter"}], "datePublic": "2026-09-23T13:57:20.000Z", "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-10-02T13:54:10.589Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/09/23/5"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-10-02T14:12:15.134Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-02T16:51:24.840136Z", "id": "CVE-2026-94422", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-02T16:51:40.902Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-94422", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-09-21T15:32:06.674Z", "datePublished": "2026-10-02T13:54:10.589Z", "dateUpdated": "2026-10-02T16:51:40.902Z"}, "containers": {"cna": {"title": "xdg-dbus-proxy: message filtering bypass via reply serial allows sandbox escape", "descriptions": [{"lang": "en", "value": "An incorrect implementation of message filtering in xdg-dbus-proxy versions before 0.1.9 allows an attacker to bypass the intended message filtering on the D-Bus session bus by setting a reply serial number on non-reply messages. A malicious or compromised Flatpak app could use this to achieve arbitrary code execution outside its sandbox. xdg-dbus-proxy was designed to be part of the sandbox boundary for Flatpak, but it is released as a separate project and is sometimes used by other app frameworks such as Firejail."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-290", "description": "Authentication Bypass by Spoofing"}]}], "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}}, {"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE"}}], "affected": [{"packageName": "xdg-dbus-proxy", "collectionURL": "https://github.com/flatpak/xdg-dbus-proxy", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "0.1.9", "versionType": "semver", "status": "affected"}]}, {"vendor": "Fedora", "product": "Fedora", "packageName": "xdg-dbus-proxy", "collectionURL": "https://bodhi.fedoraproject.org/updates/?packages=xdg-dbus-proxy", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "0.1.9", "versionType": "semver", "status": "affected"}]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "xdg-dbus-proxy", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "xdg-dbus-proxy", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:10"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-94422", "tags": ["vendor-advisory"]}, {"url": "https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-2cgv-pwcq-wvpq", "tags": ["third-party-advisory"]}, {"url": "https://github.com/flatpak/xdg-dbus-proxy/commit/e5702fca4dba9600721921fbca2dbc39dc5ca400", "tags": ["patch"]}, {"url": "https://github.com/flatpak/xdg-dbus-proxy/commit/fc027f759316fb2a6c45648200b6f100202eb84e", "tags": ["patch"]}, {"url": "https://github.com/flatpak/xdg-dbus-proxy/commit/e4465a0dfe96da3b39929a30a1ac3a22b16223e3", "tags": ["patch"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542235", "tags": ["issue-tracking"]}], "credits": [{"lang": "en", "value": "refi64", "type": "reporter"}], "datePublic": "2026-09-23T13:57:20.000Z", "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-10-02T13:54:10.589Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/09/23/5"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-10-02T14:12:15.134Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-94422", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-02T16:51:24.840136Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-02T16:51:36.441Z"}}]}}

{"affected": [{"affectedData": [{"collectionURL": "https://github.com/flatpak/xdg-dbus-proxy", "defaultStatus": "unaffected", "packageName": "xdg-dbus-proxy", "versions": [{"lessThan": "0.1.9", "status": "affected", "version": "0", "versionType": "semver"}]}, {"collectionURL": "https://bodhi.fedoraproject.org/updates/?packages=xdg-dbus-proxy", "defaultStatus": "unaffected", "packageName": "xdg-dbus-proxy", "product": "Fedora", "vendor": "Fedora", "versions": [{"lessThan": "0.1.9", "status": "affected", "version": "0", "versionType": "semver"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "affected", "packageName": "xdg-dbus-proxy", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:10"], "defaultStatus": "affected", "packageName": "xdg-dbus-proxy", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat"}], "source": "secalert@redhat.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An incorrect implementation of message filtering in xdg-dbus-proxy versions before 0.1.9 allows an attacker to bypass the intended message filtering on the D-Bus session bus by setting a reply serial number on non-reply messages. A malicious or compromised Flatpak app could use this to achieve arbitrary code execution outside its sandbox. xdg-dbus-proxy was designed to be part of the sandbox boundary for Flatpak, but it is released as a separate project and is sometimes used by other app frameworks such as Firejail."}], "id": "CVE-2026-94422", "lastModified": "2026-10-02T18:44:11.270", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-94422", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-02T16:51:24.840136Z", "version": "2.0.3"}}]}, "published": "2026-10-02T14:17:12.003", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-94422"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542235"}, {"source": "secalert@redhat.com", "url": "https://github.com/flatpak/xdg-dbus-proxy/commit/e4465a0dfe96da3b39929a30a1ac3a22b16223e3"}, {"source": "secalert@redhat.com", "url": "https://github.com/flatpak/xdg-dbus-proxy/commit/e5702fca4dba9600721921fbca2dbc39dc5ca400"}, {"source": "secalert@redhat.com", "url": "https://github.com/flatpak/xdg-dbus-proxy/commit/fc027f759316fb2a6c45648200b6f100202eb84e"}, {"source": "secalert@redhat.com", "url": "https://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-2cgv-pwcq-wvpq"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/09/23/5"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-290"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Upstream acknowledges refi64 as the original reporter.", "bugzilla": {"description": "xdg-dbus-proxy: xdg-dbus-proxy: message filtering bypass via reply serial allows sandbox escape", "id": "2542235", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542235"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cvss4": {"cvss4_base_score": "8.7", "cvss4_scoring_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "status": "draft"}, "cwe": "CWE-290", "details": ["An incorrect implementation of message filtering in xdg-dbus-proxy versions before 0.1.9 allows an attacker to bypass the intended message filtering on the D-Bus session bus by setting a reply serial number on non-reply messages. A malicious or compromised Flatpak app could use this to achieve arbitrary code execution outside its sandbox."], "mitigation": {"lang": "en:us", "value": "Avoid running untrusted Flatpak apps and avoid running untrusted apps via other frameworks that use xdg-dbus-proxy."}, "name": "CVE-2026-94422", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "xdg-dbus-proxy", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "xdg-dbus-proxy", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-09-23T13:57:20Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-94422\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-94422\nhttps://github.com/flatpak/xdg-dbus-proxy/security/advisories/GHSA-2cgv-pwcq-wvpq"], "statement": "Red Hat's CVSSv3.1 score has been calculated from the upstream-provided CVSSv4 vector (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N). The resulting CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H vector reflects a network-exploitable flaw with low attack complexity and no privileges required, but requiring a user (via a malicious/compromised Flatpak app) to interact with the D-Bus session bus. The proxy's failure to validate reply-serial numbers on non-reply messages allows a sandboxed app to bypass its message filter and reach otherwise-blocked D-Bus interfaces, resulting in a full loss of confidentiality, integrity, and availability of the host system outside the sandbox.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.1.9)"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "xdg-dbus-proxy", "vendor": "flatpak"}], "created": "2026-09-28T01:30:06.526417+00:00", "updated": "2026-10-02T16:15:08.291664+00:00", "vendors": ["flatpak", "flatpak$PRODUCT$xdg-dbus-proxy"]}