{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81525", "assignerOrgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "state": "PUBLISHED", "assignerShortName": "mongodb", "dateReserved": "2026-08-26T22:14:05.297Z", "datePublished": "2026-08-27T18:32:26.493Z", "dateUpdated": "2026-08-28T15:49:03.964Z"}, "containers": {"cna": {"title": "Cross-tenant database retargeting via dot/NUL injection in namespace strings in the PHP Driver", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-943", "description": "CWE-943: Improper Neutralization of Special Elements in Data Query Logic", "type": "CWE"}]}], "affected": [{"vendor": "MongoDB", "product": "PHP Library", "defaultStatus": "unaffected", "versions": [{"status": "affected", "version": "0", "lessThan": "1.21.4", "versionType": "semver"}, {"status": "affected", "version": "2.0.0", "lessThan": "2.4.1", "versionType": "semver"}]}, {"vendor": "MongoDB", "product": "PHP Extension", "defaultStatus": "unaffected", "versions": [{"status": "affected", "version": "0", "lessThan": "1.21.6", "versionType": "semver"}, {"status": "affected", "version": "2.0.0", "lessThan": "2.4.1", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "value": "The MongoDB client library for PHP does not sufficiently sanitize special elements in application-supplied namespace identifiers before using them to construct the target namespace for database operations. An application that incorporates untrusted text into these identifiers may have operations silently directed at a different storage location than the one the application intended.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "The MongoDB client library for PHP does not sufficiently sanitize special elements in application-supplied namespace identifiers before using them to construct the target namespace for database operations. An application that incorporates untrusted text into these identifiers may have operations silently directed at a different storage location than the one the application intended."}]}], "references": [{"url": "https://jira.mongodb.org/browse/PHPLIB-1927"}, {"url": "https://github.com/mongodb/mongo-php-library/releases/tag/1.21.4"}, {"url": "https://github.com/mongodb/mongo-php-library/releases/tag/2.4.1"}, {"url": "https://github.com/mongodb/mongo-php-driver/releases/tag/1.21.6"}, {"url": "https://github.com/mongodb/mongo-php-driver/releases/tag/2.4.1"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "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": "HIGH", "baseScore": 8.6, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseSeverity": "HIGH", "baseScore": 8.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"}}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.4"}, "providerMetadata": {"orgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "shortName": "mongodb", "dateUpdated": "2026-08-27T20:42:01.763Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-28T15:48:47.805241Z", "id": "CVE-2026-81525", "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": "2026-08-28T15:49:03.964Z"}}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "PHP Library", "vendor": "MongoDB", "versions": [{"lessThan": "1.21.4", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "2.4.1", "status": "affected", "version": "2.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "PHP Extension", "vendor": "MongoDB", "versions": [{"lessThan": "1.21.6", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "2.4.1", "status": "affected", "version": "2.0.0", "versionType": "semver"}]}], "source": "cna@mongodb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The MongoDB client library for PHP does not sufficiently sanitize special elements in application-supplied namespace identifiers before using them to construct the target namespace for database operations. An application that incorporates untrusted text into these identifiers may have operations silently directed at a different storage location than the one the application intended."}], "id": "CVE-2026-81525", "lastModified": "2026-08-28T21:16:15.740", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "cna@mongodb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.6, "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": "LOW", "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:L/UI:N/VC:H/VI:H/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": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@mongodb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-81525", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-28T15:48:47.805241Z", "version": "2.0.3"}}]}, "published": "2026-08-27T20:18:50.913", "references": [{"source": "cna@mongodb.com", "url": "https://github.com/mongodb/mongo-php-driver/releases/tag/1.21.6"}, {"source": "cna@mongodb.com", "url": "https://github.com/mongodb/mongo-php-driver/releases/tag/2.4.1"}, {"source": "cna@mongodb.com", "url": "https://github.com/mongodb/mongo-php-library/releases/tag/1.21.4"}, {"source": "cna@mongodb.com", "url": "https://github.com/mongodb/mongo-php-library/releases/tag/2.4.1"}, {"source": "cna@mongodb.com", "url": "https://jira.mongodb.org/browse/PHPLIB-1927"}], "sourceIdentifier": "cna@mongodb.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-943"}], "source": "cna@mongodb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.21.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0,2.4.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "PHP Extension", "source": "cna", "vendor": "MongoDB"}, "product": "php_extension", "vendor": "mongodb"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.21.4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0,2.4.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "PHP Library", "source": "cna", "vendor": "MongoDB"}, "product": "php_library", "vendor": "mongodb"}], "created": "2026-08-28T08:45:17.331649+00:00", "updated": "2026-08-28T16:13:57.845863+00:00", "vendors": ["mongodb", "mongodb$PRODUCT$php_extension", "mongodb$PRODUCT$php_library"]}