CVE-2026-5536

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{"affected": [{"affectedData": [{"modules": ["gRPC server"], "product": "FedML", "vendor": "FedML-AI", "versions": [{"status": "affected", "version": "0.8.0"}, {"status": "affected", "version": "0.8.1"}, {"status": "affected", "version": "0.8.2"}, {"status": "affected", "version": "0.8.3"}, {"status": "affected", "version": "0.8.4"}, {"status": "affected", "version": "0.8.5"}, {"status": "affected", "version": "0.8.6"}, {"status": "affected", "version": "0.8.7"}, {"status": "affected", "version": "0.8.8"}, {"status": "affected", "version": "0.8.9"}]}], "source": "cna@vuldb.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:tensoropera:fedml:*:*:*:*:*:*:*:*", "matchCriteriaId": "FFEBDDAA-4090-4192-9379-2097CFD48C12", "versionEndIncluding": "0.8.9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A weakness has been identified in FedML-AI FedML up to 0.8.9. Affected is the function sendMessage of the file grpc_server.py of the component gRPC server. Executing a manipulation can lead to deserialization. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way."}, {"lang": "es", "value": "Se ha identificado una debilidad en FedML-AI FedML hasta la versi\u00f3n 0.8.9. Afecta a la funci\u00f3n sendMessage del archivo grpc_server.py del componente servidor gRPC. La ejecuci\u00f3n de una manipulaci\u00f3n puede conducir a la deserializaci\u00f3n. El ataque puede realizarse de forma remota. Se contact\u00f3 al proveedor con antelaci\u00f3n sobre esta divulgaci\u00f3n, pero no respondi\u00f3 de ninguna manera."}], "id": "CVE-2026-5536", "lastModified": "2026-07-24T20:10:00.147", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "cna@vuldb.com", "type": "Secondary"}], "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: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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5536", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-06T14:02:58.373354Z", "version": "2.0.3"}}]}, "published": "2026-04-05T04:16:09.487", "references": [{"source": "cna@vuldb.com", "tags": ["Third Party Advisory"], "url": "https://github.com/AnalogyC0de/public_exp/issues/26"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/submit/782201"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/vuln/355289"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required"], "url": "https://vuldb.com/vuln/355289/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-502"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.6"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.7"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.8"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "0.8.9"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "FedML", "source": "cna", "vendor": "FedML-AI"}, "product": "fedml", "vendor": "fedml-ai"}], "analysis": {"en": {"generated_at": "2026-04-05T06:22:31.419257+00:00", "value": {"mitigation_remediation": ["Update to the latest FedML release that addresses the deserialization issue.", "If an update is unavailable, temporarily limit access to the gRPC service by firewalling the listening port or applying network segmentation.", "Verify that no untrusted input reaches the sendMessage endpoint; apply application\u2011level validation if possible.", "Monitor logs for suspicious gRPC traffic and investigate any anomalies.", "Contact FedML support for an official fix timeline."], "summary": {"action": "Patch Now", "impact": "Remote Code Execution via deserialization"}, "threat_synthesis": {"affected_systems": "FedML-AI\u2019s FedML product, versions up to 0.8.9, includes the vulnerable gRPC server. Any installation that uses the sendMessage function in grpc_server.py before or at this version is at risk. The product is commonly used in distributed machine learning environments where remote connections to the gRPC service are required.", "description_and_impact": "The vulnerability exists in FedML\u2019s gRPC server component, specifically in the sendMessage function of grpc_server.py. An attacker who can send a crafted message to the server can trigger unsafe deserialization of untrusted data. The flaw stems from improper input validation and the deserialization of potentially malicious payloads, which may allow the attacker to execute arbitrary code, compromising confidentiality, integrity or availability of the affected system.", "risk_and_exploitability": "The CVSS base score is 6.9, indicating medium severity. No EPSS data is available and the vulnerability is not listed in CISA\u2019s KEV catalog. The injection can be performed remotely, relying on network traffic to the gRPC port. Because the flaw involves deserialization, without additional defenses an attacker with network access could possibly chain the vulnerability into remote code execution, making the risk significant for exposed deployments."}}}}, "created": "2026-04-06T20:26:43.589466+00:00", "updated": "2026-04-06T21:57:18.349340+00:00", "vendors": ["fedml-ai", "fedml-ai$PRODUCT$fedml"]}