CVE-2026-9828

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constitutes a bypass of the \nintended security restrictions.\n\n\n\nThis issue affects logback: through 1.5.32 inclusive.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Deserialization of untrusted data vulnerability in QOS.CH Sarl logback logback-core (HardenedObjectInputStream (logback-core) modules) allows Object Injection albeit heavily restricted.<br><br>More precisely, an attacker able to influence serialized data sent to \nSimpleSocketServer or SimpleSSLSocketServer can instantiate objects from\n classes in the <b>java.lang </b>and <b>java.util </b>packages that are not explicitly\n blocked.<br><br>Although deserialization is heavily restricted by HardenedObjectInputStream and no \npractical way to achieve remote code execution or significant privilege \nescalation has been identified, this issue constitutes a bypass of the \nintended security restrictions.<br><br><p>This issue affects logback: through 1.5.32 inclusive.<br><br><br></p>"}]}], 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to gain control of the target host.&nbsp;"}]}], "credits": [{"lang": "en", "value": "York Shen https://github.com/york-shen", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-28T14:20:28.756230Z", "id": "CVE-2026-9828", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-28T14:20:37.401Z"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "modules": ["HardenedObjectInputStream (logback-core)"], "packageName": "logback-core", "product": "logback", "programFiles": ["HardenedObjectInputStream.java"], "repo": "https://github.com/qos-ch/logback", "vendor": "QOS.CH Sarl", "versions": [{"lessThanOrEqual": "1.5.32", "status": "affected", "version": "0", "versionType": "maven"}, {"status": "unaffected", "version": "1.5.33"}]}], "source": "vulnerability@ncsc.ch"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Deserialization of untrusted data vulnerability in QOS.CH Sarl logback logback-core (HardenedObjectInputStream (logback-core) modules) allows Object Injection albeit heavily restricted.\n\nMore precisely, an attacker able to influence serialized data sent to \nSimpleSocketServer or SimpleSSLSocketServer can instantiate objects from\n classes in the java.lang and java.util packages that are not explicitly\n blocked.\n\nAlthough deserialization is heavily restricted by HardenedObjectInputStream and no \npractical way to achieve remote code execution or significant privilege \nescalation has been identified, this issue constitutes a bypass of the \nintended security restrictions.\n\n\n\nThis issue affects logback: through 1.5.32 inclusive."}, {"lang": "es", "value": "Vulnerabilidad de deserializaci\u00f3n de datos no confiables en QOS.CH Sarl logback logback-core (m\u00f3dulos HardenedObjectInputStream (logback-core)) permite la inyecci\u00f3n de objetos, aunque muy restringida.\n\nM\u00e1s precisamente, un atacante capaz de influir en los datos serializados enviados a SimpleSocketServer o SimpleSSLSocketServer puede instanciar objetos de clases en los paquetes java.lang y java.util que no est\u00e1n expl\u00edcitamente bloqueadas.\n\nAunque la deserializaci\u00f3n est\u00e1 muy restringida por HardenedObjectInputStream y no se ha identificado una forma pr\u00e1ctica de lograr la ejecuci\u00f3n remota de c\u00f3digo o una escalada significativa de privilegios, este problema constituye un bypass de las restricciones de seguridad previstas.\n\nEste problema afecta a logback: hasta la versi\u00f3n 1.5.32 inclusive."}], "id": "CVE-2026-9828", "lastModified": "2026-10-26T11:10:00.157", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.9, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "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": "GREEN", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/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:L/U:Green", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "LOW"}, "source": "vulnerability@ncsc.ch", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-9828", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-28T14:20:28.756230Z", "version": "2.0.3"}}]}, "published": "2026-05-28T14:16:27.430", "references": [{"source": "vulnerability@ncsc.ch", "url": "https://logback.qos.ch/news.html#1.5.33"}], "sourceIdentifier": "vulnerability@ncsc.ch", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "vulnerability@ncsc.ch", "type": "Secondary"}]}

{}

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