CVE-2026-31828

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Prior to 9.5.2-alpha.13 and 8.6.26, the LDAP authentication adapter is vulnerable to LDAP injection. User-supplied input (authData.id) is interpolated directly into LDAP Distinguished Names (DN) and group search filters without escaping special characters. This allows an attacker with valid LDAP credentials to manipulate the bind DN structure and to bypass group membership checks. This enables privilege escalation from any authenticated LDAP user to a member of any restricted group. The vulnerability affects Parse Server deployments that use the LDAP authentication adapter with group-based access control. This vulnerability is fixed in 9.5.2-alpha.13 and 8.6.26."}, {"lang": "es", "value": "Parse Server es un backend de c\u00f3digo abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Anteriormente a 9.5.2-alpha.13 y 8.6.26, el adaptador de autenticaci\u00f3n LDAP es vulnerable a la inyecci\u00f3n LDAP. La entrada proporcionada por el usuario (authData.id) se interpola directamente en los Nombres Distinguidos LDAP (DN) y en los filtros de b\u00fasqueda de grupo sin escapar caracteres especiales. Esto permite a un atacante con credenciales LDAP v\u00e1lidas manipular la estructura del DN de enlace y eludir las comprobaciones de membres\u00eda de grupo. Esto posibilita la escalada de privilegios desde cualquier usuario LDAP autenticado a un miembro de cualquier grupo restringido. La vulnerabilidad afecta a los despliegues de Parse Server que utilizan el adaptador de autenticaci\u00f3n LDAP con control de acceso basado en grupos. Esta vulnerabilidad est\u00e1 corregida en 9.5.2-alpha.13 y 8.6.26."}], "id": "CVE-2026-31828", "lastModified": "2026-06-17T10:34:32.057", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "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:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.0, "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": "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:N/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": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31828", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-11T15:51:50.477327Z", "version": "2.0.3"}}]}, "published": "2026-03-10T22:16:20.783", "references": [{"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/parse-community/parse-server/releases/tag/8.6.26"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.13"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-7m6r-fhh7-r47c"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-90"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.5.2-alpha.13)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.6.26)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "parse-server", "source": "cna", "vendor": "parse-community"}, "product": "parse_server", "vendor": "parse_community"}], "analysis": {"en": {"generated_at": "2026-04-16T03:07:02.131270+00:00", "value": {"mitigation_remediation": ["Upgrade Parse Server to version 9.5.2-alpha.13 or 8.6.26 (or newer that contains the fix).", "Ensure that LDAP authentication is correctly configured and that the patched code is in use; remove any custom overrides that might re\u2011introduce unsanitized input handling.", "If an immediate upgrade is not possible, restrict LDAP account privileges to the minimum required for application operation and audit group membership changes for anomalous patterns.", "Implement logging of bind DN usage and monitor for repeated authentication failures or unexpected group inclusion that may indicate an attempted LDAP injection."], "summary": {"action": "Apply Patch", "impact": "Privilege Escalation via LDAP Injection"}, "threat_synthesis": {"affected_systems": "Parse Server (parse-community:parse-server) deployments that employ the LDAP authentication adapter with group\u2011based access control. Any configuration using LDAP before the patched releases\u2014specifically before 9.5.2-alpha.13 and 8.6.26\u2014contributes to the vulnerability. Systems still running earlier major or minor releases are also affected.", "description_and_impact": "The LDAP authentication adapter in Parse Server until versions 9.5.2-alpha.13 and 8.6.26 concatenates unescaped user input into LDAP Distinguished Names and group search filters. This creates an injection vector that allows an authenticated attacker to alter the bind DN or group membership checks. The attacker can then force a bind or group query that lists the user as a member of any protected group, effectively elevating privileges within the application.", "risk_and_exploitability": "The weakness carries a CVSS score of 6, indicating moderate severity. Exploit probability is very low, with an EPSS below 1%, and the vulnerability is not catalogued in the CISA KEV list. Exploitation requires possession of valid LDAP credentials, so the attack is limited to authenticated users. The primary risk is privilege escalation to restricted groups, which could lead to unauthorized access to protected resources."}}}}, "created": "2026-03-11T11:39:12.393275+00:00", "updated": "2026-04-16T03:15:22.946056+00:00", "vendors": ["parse_community", "parse_community$PRODUCT$parse_server"], "weaknesses": ["CWE-90"]}