CVE-2026-33527

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Prior to versions 8.6.57 and 9.6.0-alpha.48, an authenticated user can overwrite server-generated session fields such as expiresAt and createdWith when updating their own session via the REST API. This allows bypassing the server's configured session lifetime policy, making a session effectively permanent. This issue has been patched in versions 8.6.57 and 9.6.0-alpha.48."}, {"lang": "es", "value": "Parse Server es un backend de c\u00f3digo abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Antes de las versiones 8.6.57 y 9.6.0-alpha.48, un usuario autenticado puede sobrescribir campos de sesi\u00f3n generados por el servidor, como expiresAt y createdWith, al actualizar su propia sesi\u00f3n a trav\u00e9s de la API REST. Esto permite eludir la pol\u00edtica de vida \u00fatil de la sesi\u00f3n configurada del servidor, haciendo que una sesi\u00f3n sea efectivamente permanente. Este problema ha sido parcheado en las versiones 8.6.57 y 9.6.0-alpha.48."}], "id": "CVE-2026-33527", "lastModified": "2026-06-17T10:37:39.310", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "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:N/PR:L/UI:N/VC:N/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": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33527", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-24T20:36:32.237013Z", "version": "2.0.3"}}]}, "published": "2026-03-24T19:16:54.510", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/parse-community/parse-server/commit/26b628c8fb3cc79ea955374769eebcff6f8a8a73"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/parse-community/parse-server/commit/ea68fc0b22a6056c9675149469ff57817f7cf984"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10263"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/parse-community/parse-server/pull/10264"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.6.57)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.6.0-alpha.48)"}}], "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": "2026-03-25T22:50:44.962754+00:00", "value": {"mitigation_remediation": ["Update Parse Server to version 8.6.57 or 9.6.0\u2011alpha.48 or later to apply the vendor patch.", "Verify that session update requests no longer allow overwriting of expiresAt or createdWith fields.", "If an upgrade is not possible immediately, restrict the session update endpoint to prevent authenticated users from modifying these fields, or monitor API usage for unauthorized changes."], "summary": {"action": "Patch Immediately", "impact": "Session Lifetime Bypass"}, "threat_synthesis": {"affected_systems": "The issue affects parse-community's Parse Server before version 8.6.57 and prior to 9.6.0\u2011alpha.48. Systems running those releases on any Node.js\u2011enabled infrastructure are vulnerable. The patch is required to eliminate the ability to change these critical session fields via the REST API.", "description_and_impact": "An authenticated user can send a session update request to Parse Server and overwrite server\u2011generated fields such as expiresAt and createdWith. The vulnerability enables the session to persist beyond the configured expiry period, effectively making the session permanent. This flaw falls under CWE\u2011863, where variables that should be protected are exposed to modification. The consequences include unauthorized persistence of access and potential escalation of privileges if the session is used to access privileged resources over an extended time.", "risk_and_exploitability": "The CVSS score of 5.3 indicates a moderate severity, and the EPSS score is below 1%, showing a low likelihood of widespread exploitation at present. The vulnerability is limited to authenticated users interacting with the session update endpoint; no public or remote code execution vector is disclosed. While the impact of a permanent session is significant for the user\u2019s own account, the overall risk remains moderate due to the requirement for valid credentials and lack of known public exploits. The vulnerability is not listed in CISA\u2019s KEV catalog, suggesting it is not actively targeted by known threat actors."}}}}, "created": "2026-03-25T11:46:42.007915+00:00", "updated": "2026-03-26T12:18:57.777598+00:00", "vendors": ["parse_community", "parse_community$PRODUCT$parse_server"]}