{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-122053", "assignerOrgId": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "state": "PUBLISHED", "assignerShortName": "Checkmarx", "dateReserved": "2026-11-04T16:22:10.624Z", "datePublished": "2026-11-06T16:46:46.986Z", "dateUpdated": "2026-11-06T16:51:02.357Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "shortName": "Checkmarx", "dateUpdated": "2026-11-06T16:51:02.357Z"}, "title": "Symfony: ObjectNormalizer Dotted-Key Property-Path Traversal Bypasses #[Ignore] on Nested Objects", "datePublic": "2026-11-06T16:46:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-915", "description": "CWE-915 Improperly controlled modification of Dynamically-Determined object attributes", "type": "CWE"}]}], "affected": [{"vendor": "sensiolabs", "product": "symfony", "collectionURL": "https://packagist.org/packages/symfony/serializer", "packageName": "symfony/serializer", "repo": "https://github.com/symfony/serializer", "modules": ["Symfony\\Component\\Serializer\\Normalizer\\ObjectNormalizer::isAllowedAttribute()"], "versions": [{"status": "affected", "version": "5.4.41", "lessThan": "5.4.56", "versionType": "git"}, {"status": "affected", "version": "6.4.9", "lessThan": "6.4.50", "versionType": "git"}, {"status": "affected", "version": "7.0.9", "lessThan": "7.1.0", "versionType": "git"}, {"status": "affected", "version": "7.1.2", "lessThan": "7.4.23", "versionType": "git"}, {"status": "affected", "version": "8.0.0", "lessThan": "8.1.11", "versionType": "git"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.41", "versionEndExcluding": "5.4.56"}, {"vulnerable": true, "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4.9", "versionEndExcluding": "6.4.50"}, {"vulnerable": true, "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.9", "versionEndExcluding": "7.1.0"}, {"vulnerable": true, "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1.2", "versionEndExcluding": "7.4.23"}, {"vulnerable": true, "criteria": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.0.0", "versionEndExcluding": "8.1.11"}]}]}], "descriptions": [{"lang": "en", "value": "The Symfony Serializer component\u00a0ObjectNormalizer\u00a0treats any attribute name containing\u00a0.\u00a0(and, from Symfony 6.4,\u00a0[) as a writable property path, allowing untrusted input to modify properties of nested objects and bypass their\u00a0#[Ignore] metadata attribute in\u00a0Symfony versions 5.4.41 prior to 5.4.56, 6.4.9 prior to 6.4.50, 7.0.9 prior to 7.1.0, 7.1.2 prior to 7.4.23, and 8.x prior to 8.1.11.\nObjectNormalizer::isAllowedAttribute() accepts such names, and setAttributeValue() hands the name straight to PropertyAccessor::setValue(), which parses it as a property path and traverses into the nested object. A payload key such as\u00a0customer.admin\u00a0writes to\u00a0$order->customer->admin. The\u00a0#[Ignore]\u00a0metadata attribute is only consulted when the nested object is denormalized in its own right, never when it is reached through a path.\u00a0#[Groups]\u00a0restrictions are not bypassed: the path is only accepted when no groups are passed in the context, and then groups restrict nothing. When the root class carries neither #[Ignore] nor #[Groups], no allowlist applies and every key of the payload is let through. Because\u00a0PropertyAccessor also resolves a path segment against public methods, a segment matching a public method name invokes that method with the attacker\u2019s value.Applications that bind untrusted input to objects are affected, including controllers using #[MapRequestPayload]\u00a0or\u00a0#[MapQueryString], whose default normalizer is ObjectNormalizer. With OBJECT_TO_POPULATE, as used for partial updates, the traversal reaches an already hydrated entity graph, and the modified field may be persisted.\n\nThe fix accepts a property path only when the class metadata declares an attribute of that exact name. Declared paths keep working unchanged, and a path in the payload with no matching declaration is ignored.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "The Symfony Serializer component&nbsp;<code>ObjectNormalizer</code>&nbsp;treats any attribute name containing&nbsp;<code>.</code>&nbsp;(and, from Symfony 6.4,&nbsp;<code>[</code>) as a writable property path, allowing untrusted input to modify properties of nested objects and bypass their&nbsp;<code>#[Ignore]</code> metadata attribute in&nbsp;Symfony versions 5.4.41 prior to 5.4.56, 6.4.9 prior to 6.4.50, 7.0.9 prior to 7.1.0, 7.1.2 prior to 7.4.23, and 8.x prior to 8.1.11.<br><code>ObjectNormalizer::isAllowedAttribute()</code> accepts such names, and <code>setAttributeValue()</code> hands the name straight to <code>PropertyAccessor::setValue()</code>, which parses it as a property path and traverses into the nested object. A payload key such as&nbsp;<code>customer.admin</code>&nbsp;writes to&nbsp;<code>$order-&gt;customer-&gt;admin</code>. The&nbsp;<code>#[Ignore]</code>&nbsp;metadata attribute is only consulted when the nested object is denormalized in its own right, never when it is reached through a path.&nbsp;<code>#[Groups]</code>&nbsp;restrictions are not bypassed: the path is only accepted when no groups are passed in the context, and then groups restrict nothing. When the root class carries neither <code>#[Ignore]</code> nor <code>#[Groups]</code>, no allowlist applies and every key of the payload is let through. Because&nbsp;<code>PropertyAccessor</code> also resolves a path segment against public methods, a segment matching a public method name invokes that method with the attacker\u2019s value.<div>Applications that bind untrusted input to objects are affected, including controllers using <code>#[MapRequestPayload]</code>&nbsp;or&nbsp;<code>#[MapQueryString]</code>, whose default normalizer is <code>ObjectNormalizer</code>. With <code>OBJECT_TO_POPULATE</code>, as used for partial updates, the traversal reaches an already hydrated entity graph, and the modified field may be persisted.</div><div>The fix accepts a property path only when the class metadata declares an attribute of that exact name. Declared paths keep working unchanged, and a path in the payload with no matching declaration is ignored.</div>"}]}], "references": [{"url": "https://github.com/symfony/symfony/security/advisories/GHSA-hqp2-7rr8-hf26", "tags": ["third-party-advisory"]}, {"url": "https://github.com/symfony/symfony/commit/fcaf87a93c7fa5b7fe9e9e8382d4ed0d0c52c67c", "tags": ["patch"]}, {"url": "https://github.com/symfony/symfony/commit/9f7390678a255f7962fb1c81c42b26fa907d3437", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6.9, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"}}], "credits": [{"lang": "en", "value": "Alexandre Daubois", "type": "reporter"}, {"lang": "en", "value": "Nicolas Grekas", "type": "remediation developer"}, {"lang": "en", "value": "The PHP Foundation", "type": "reporter"}], "source": {"advisory": "GHSA-hqp2-7rr8-hf26", "discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://packagist.org/packages/symfony/serializer", "defaultStatus": "unaffected", "modules": ["Symfony\\Component\\Serializer\\Normalizer\\ObjectNormalizer::isAllowedAttribute()"], "packageName": "symfony/serializer", "product": "symfony", "repo": "https://github.com/symfony/serializer", "vendor": "sensiolabs", "versions": [{"lessThan": "5.4.56", "status": "affected", "version": "5.4.41", "versionType": "git"}, {"lessThan": "6.4.50", "status": "affected", "version": "6.4.9", "versionType": "git"}, {"lessThan": "7.1.0", "status": "affected", "version": "7.0.9", "versionType": "git"}, {"lessThan": "7.4.23", "status": "affected", "version": "7.1.2", "versionType": "git"}, {"lessThan": "8.1.11", "status": "affected", "version": "8.0.0", "versionType": "git"}]}], "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Symfony Serializer component\u00a0ObjectNormalizer\u00a0treats any attribute name containing\u00a0.\u00a0(and, from Symfony 6.4,\u00a0[) as a writable property path, allowing untrusted input to modify properties of nested objects and bypass their\u00a0#[Ignore] metadata attribute in\u00a0Symfony versions 5.4.41 prior to 5.4.56, 6.4.9 prior to 6.4.50, 7.0.9 prior to 7.1.0, 7.1.2 prior to 7.4.23, and 8.x prior to 8.1.11.\nObjectNormalizer::isAllowedAttribute() accepts such names, and setAttributeValue() hands the name straight to PropertyAccessor::setValue(), which parses it as a property path and traverses into the nested object. A payload key such as\u00a0customer.admin\u00a0writes to\u00a0$order->customer->admin. The\u00a0#[Ignore]\u00a0metadata attribute is only consulted when the nested object is denormalized in its own right, never when it is reached through a path.\u00a0#[Groups]\u00a0restrictions are not bypassed: the path is only accepted when no groups are passed in the context, and then groups restrict nothing. When the root class carries neither #[Ignore] nor #[Groups], no allowlist applies and every key of the payload is let through. Because\u00a0PropertyAccessor also resolves a path segment against public methods, a segment matching a public method name invokes that method with the attacker\u2019s value.Applications that bind untrusted input to objects are affected, including controllers using #[MapRequestPayload]\u00a0or\u00a0#[MapQueryString], whose default normalizer is ObjectNormalizer. With OBJECT_TO_POPULATE, as used for partial updates, the traversal reaches an already hydrated entity graph, and the modified field may be persisted.\n\nThe fix accepts a property path only when the class metadata declares an attribute of that exact name. Declared paths keep working unchanged, and a path in the payload with no matching declaration is ignored."}], "id": "CVE-2026-122053", "lastModified": "2026-11-06T17:17:20.123", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "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": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/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": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "type": "Secondary"}]}, "published": "2026-11-06T17:17:20.123", "references": [{"source": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "url": "https://github.com/symfony/symfony/commit/9f7390678a255f7962fb1c81c42b26fa907d3437"}, {"source": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "url": "https://github.com/symfony/symfony/commit/fcaf87a93c7fa5b7fe9e9e8382d4ed0d0c52c67c"}, {"source": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "url": "https://github.com/symfony/symfony/security/advisories/GHSA-hqp2-7rr8-hf26"}], "sourceIdentifier": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-915"}], "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.41,5.4.56)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.4.9,6.4.50)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.0.9,7.1.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.1.2,7.4.23)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.1.11)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "inferred", "scores": [{"score": 100.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "symfony", "source": "cna", "vendor": "sensiolabs"}, "product": "symfony", "vendor": "sensiolabs"}], "created": "2026-11-06T18:45:07.440245+00:00", "updated": "2026-11-06T18:45:07.440268+00:00", "vendors": ["sensiolabs", "sensiolabs$PRODUCT$symfony"]}