CVE-2026-9828

{
  "id": "CVE-2026-9828",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-28T14:16:27.430",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Deferred",
  "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 deserialización de datos no confiables en QOS.CH Sarl logback logback-core (módulos HardenedObjectInputStream (logback-core)) permite la inyección de objetos, aunque muy restringida.\n\nMás 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 están explícitamente bloqueadas.\n\nAunque la deserialización está muy restringida por HardenedObjectInputStream y no se ha identificado una forma práctica de lograr la ejecución remota de código 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 versión 1.5.32 inclusive."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "QOS.CH Sarl",
          "product": "logback",
          "defaultStatus": "unaffected",
          "packageName": "logback-core",
          "modules": [
            "HardenedObjectInputStream (logback-core)"
          ],
          "programFiles": [
            "HardenedObjectInputStream.java"
          ],
          "repo": "https://github.com/qos-ch/logback",
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "1.5.32",
              "versionType": "maven",
              "status": "affected"
            },
            {
              "version": "1.5.33",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "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",
          "baseScore": 2.9,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "LOW",
          "providerUrgency": "GREEN"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-28T14:20:28.756230Z",
          "id": "CVE-2026-9828",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://logback.qos.ch/news.html#1.5.33",
      "source": "[email protected]"
    }
  ]
}