{"api_version":"1","generated_at":"2026-11-06T18:31:13+00:00","cve":"CVE-2026-123824","urls":{"html":"https://cve.report/CVE-2026-123824","api":"https://cve.report/api/cve/CVE-2026-123824.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-123824","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-123824"},"summary":{"title":"Symfony: XXE (Local File Read) in Config XmlUtils::parse() via validateOnParse = true","description":"The Symfony Config component XmlUtils::parse() enables DTD validation before rejecting documents that carry a doctype, allowing XML external entity (XXE) injection in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11. A remote attacker who can supply XML to this method can determine whether local files exist, cause a denial of service, and, in some configurations, exfiltrate local file content via a crafted XML document whose doctype declares an external file:// entity.\nXmlUtils::parse() sets $dom->validateOnParse = true before calling loadXML() and only rejects documents carrying a doctype afterwards. Enabling DTD validation makes libxml resolve external entities during loadXML(), and LIBXML_NONET blocks http:// but not file://, so a file:// entity is read from disk before the doctype rejection runs. The content of the file is not returned to the caller, but the distinct libxml error for a missing path reveals whether a file exists, and an entity pointing at a large or slow file causes a denial of service. If the application registers a network-capable stream wrapper such as s3://, a parameter entity can also send the content of a local file to an external server. This is the same issue as CVE-2026-45071, which was fixed in the DomCrawler component but not in Config.\n\nApplications are affected if they pass untrusted XML to XmlUtils::parse() directly. The Symfony components that call it process developer-provided or operator-configured sources, such as configuration files and the XLIFF documents fetched by the translation providers.","state":"PUBLISHED","assigner":"Checkmarx","published_at":"2026-11-06 18:18:05","updated_at":"2026-11-06 18:18:05"},"problem_types":["CWE-611","CWE-611 CWE-611 Improper Restriction of XML External Entity 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Grekas","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"collectionURL":"https://packagist.org/packages/symfony/config","defaultStatus":"unaffected","modules":["Symfony\\Component\\Config\\Util\\XmlUtils::parse"],"packageName":"symfony/config","product":"symfony","repo":"https://github.com/symfony/config","vendor":"sensiolabs","versions":[{"lessThan":"5.4.56","status":"affected","version":"0","versionType":"git"},{"lessThan":"6.4.50","status":"affected","version":"6.0.0","versionType":"git"},{"lessThan":"7.4.23","status":"affected","version":"7.0.0","versionType":"git"},{"lessThan":"8.1.11","status":"affected","version":"8.0.0","versionType":"git"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.56","versionStartIncluding":"0","vulnerable":true},{"criteria":"cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*","versionEndExcluding":"6.4.50","versionStartIncluding":"6.0.0","vulnerable":true},{"criteria":"cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*","versionEndExcluding":"7.4.23","versionStartIncluding":"7.0.0","vulnerable":true},{"criteria":"cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*","versionEndExcluding":"8.1.11","versionStartIncluding":"8.0.0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"credits":[{"lang":"en","type":"reporter","value":"Prithiv Kumaravel from ProjectDiscovery"},{"lang":"en","type":"reporter","value":"Björn Meyer from Shopware AG"},{"lang":"en","type":"remediation developer","value":"Nicolas Grekas"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The Symfony Config component&nbsp;<code>XmlUtils::parse()</code>&nbsp;enables DTD validation before rejecting documents that carry a doctype, allowing&nbsp;XML external entity (XXE) injection in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11. A remote attacker who can supply XML to this method can determine whether local files exist, cause a denial of service, and, in some configurations, exfiltrate local file content via a crafted XML document whose doctype declares an external&nbsp;<code>file://</code>&nbsp;entity.<br><div><span>XmlUtils::parse()</span>&nbsp;sets&nbsp;<code>$dom-&gt;validateOnParse = true</code>&nbsp;before calling&nbsp;<code>loadXML()</code>&nbsp;and only rejects documents carrying a doctype afterwards. Enabling DTD validation makes libxml resolve external entities during&nbsp;<code>loadXML()</code>, and&nbsp;<code>LIBXML_NONET</code>&nbsp;blocks&nbsp;<code>http://</code>&nbsp;but not&nbsp;<code>file://</code>, so a&nbsp;<code>file://</code>&nbsp;entity is read from disk before the doctype rejection runs. The content of the file is not returned to the caller, but the distinct libxml error for a missing path reveals whether a file exists, and an entity pointing at a large or slow file causes a denial of service. If the application registers a network-capable stream wrapper such as&nbsp;<code>s3://</code>, a parameter entity can also send the content of a local file to an external server.&nbsp;This is the same issue as CVE-2026-45071, which was fixed in the&nbsp;<code>DomCrawler</code>&nbsp;component but not in&nbsp;<code>Config</code>.</div><div>Applications are affected if they pass untrusted XML to&nbsp;<code>XmlUtils::parse()</code>&nbsp;directly. The Symfony components that call it process developer-provided or operator-configured sources, such as configuration files and the XLIFF documents fetched by the translation providers.</div>"}],"value":"The Symfony Config component XmlUtils::parse() enables DTD validation before rejecting documents that carry a doctype, allowing XML external entity (XXE) injection in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11. A remote attacker who can supply XML to this method can determine whether local files exist, cause a denial of service, and, in some configurations, exfiltrate local file content via a crafted XML document whose doctype declares an external file:// entity.\nXmlUtils::parse() sets $dom->validateOnParse = true before calling loadXML() and only rejects documents carrying a doctype afterwards. Enabling DTD validation makes libxml resolve external entities during loadXML(), and LIBXML_NONET blocks http:// but not file://, so a file:// entity is read from disk before the doctype rejection runs. The content of the file is not returned to the caller, but the distinct libxml error for a missing path reveals whether a file exists, and an entity pointing at a large or slow file causes a denial of service. If the application registers a network-capable stream wrapper such as s3://, a parameter entity can also send the content of a local file to an external server. This is the same issue as CVE-2026-45071, which was fixed in the DomCrawler component but not in Config.\n\nApplications are affected if they pass untrusted XML to XmlUtils::parse() directly. The Symfony components that call it process developer-provided or operator-configured sources, such as configuration files and the XLIFF documents fetched by the translation providers."}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-611","description":"CWE-611 Improper Restriction of XML External Entity Reference","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-06T17:19:24.750Z","orgId":"596c5446-0ce5-4ba2-aa66-48b3b757a647","shortName":"Checkmarx"},"references":[{"tags":["third-party-advisory"],"url":"https://github.com/symfony/symfony/security/advisories/GHSA-5jff-8h8q-r5qx"},{"tags":["patch"],"url":"https://github.com/symfony/symfony/commit/334ef21a6039355c05b123e7df60699be0e28da3"}],"source":{"advisory":"GHSA-5jff-8h8q-r5qx","discovery":"UNKNOWN"},"title":"Symfony: XXE (Local File Read) in Config XmlUtils::parse() via validateOnParse = true","x_generator":{"engine":"Vulnogram 1.0.5"}}},"cveMetadata":{"assignerOrgId":"596c5446-0ce5-4ba2-aa66-48b3b757a647","assignerShortName":"Checkmarx","cveId":"CVE-2026-123824","datePublished":"2026-11-06T17:19:24.750Z","dateReserved":"2026-11-06T15:59:52.152Z","dateUpdated":"2026-11-06T17:19:24.750Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-06 18:18:05","lastModifiedDate":"2026-11-06 18:18:05","problem_types":["CWE-611","CWE-611 CWE-611 Improper Restriction of XML External Entity Reference"],"metrics":{"cvssMetricV40":[{"source":"596c5446-0ce5-4ba2-aa66-48b3b757a647","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/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","baseScore":2.3,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"123824","Ordinal":"1","Title":"Symfony: XXE (Local File Read) in Config XmlUtils::parse() via v","CVE":"CVE-2026-123824","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"123824","Ordinal":"1","NoteData":"The Symfony Config component XmlUtils::parse() enables DTD validation before rejecting documents that carry a doctype, allowing XML external entity (XXE) injection in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11. A remote attacker who can supply XML to this method can determine whether local files exist, cause a denial of service, and, in some configurations, exfiltrate local file content via a crafted XML document whose doctype declares an external file:// entity.\nXmlUtils::parse() sets $dom->validateOnParse = true before calling loadXML() and only rejects documents carrying a doctype afterwards. Enabling DTD validation makes libxml resolve external entities during loadXML(), and LIBXML_NONET blocks http:// but not file://, so a file:// entity is read from disk before the doctype rejection runs. The content of the file is not returned to the caller, but the distinct libxml error for a missing path reveals whether a file exists, and an entity pointing at a large or slow file causes a denial of service. If the application registers a network-capable stream wrapper such as s3://, a parameter entity can also send the content of a local file to an external server. This is the same issue as CVE-2026-45071, which was fixed in the DomCrawler component but not in Config.\n\nApplications are affected if they pass untrusted XML to XmlUtils::parse() directly. The Symfony components that call it process developer-provided or operator-configured sources, such as configuration files and the XLIFF documents fetched by the translation providers.","Type":"Description","Title":"Symfony: XXE (Local File Read) in Config XmlUtils::parse() via v"}]}}}