{
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      {
        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-9828",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-28T14:20:28.756230Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          "dateUpdated": "2026-05-28T14:20:37.401Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "SimpleSocketServer or SimpleSSLSockerServer must be running on the target host and reachable by the attacker."
            }
          ],
          "value": "SimpleSocketServer or SimpleSSLSockerServer must be running on the target host and reachable by the attacker."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "York Shen https://github.com/york-shen"
        }
      ],
      "datePublic": "2026-05-28T07:47:00.000Z",
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
            {
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              "type": "text/html",
              "value": "Deserialization of untrusted data vulnerability in QOS.CH Sarl logback logback-core (HardenedObjectInputStream (logback-core) modules) allows Object Injection albeit heavily restricted.\u003cbr\u003e\u003cbr\u003eMore precisely, an attacker able to influence serialized data sent to \nSimpleSocketServer or SimpleSSLSocketServer can instantiate objects from\n classes in the \u003cb\u003ejava.lang \u003c/b\u003eand \u003cb\u003ejava.util \u003c/b\u003epackages that are not explicitly\n blocked.\u003cbr\u003e\u003cbr\u003eAlthough 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.\u003cbr\u003e\u003cbr\u003e\u003cp\u003eThis issue affects logback: through 1.5.32 inclusive.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c/p\u003e"
            }
          ],
          "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."
        }
      ],
      "exploits": [
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          "supportingMedia": [
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              "type": "text/html",
              "value": "Given that\u0026nbsp;HardenedObjectInputStream used by SimpleSocketServer and SimpleSSLSockerServer already heavily restricts the set of deserializable classes, it is unlikely that the attacker can escalate the vulnerability to gain control of the target host.\u0026nbsp;"
            }
          ],
          "value": "Given that\u00a0HardenedObjectInputStream used by SimpleSocketServer and SimpleSSLSockerServer already heavily restricts the set of deserializable classes, it is unlikely that the attacker can escalate the vulnerability to gain control of the target host."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-586",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-586 Object Injection"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2.9,
            "baseSeverity": "LOW",
            "exploitMaturity": "PROOF_OF_CONCEPT",
            "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/RE:L/U:Green",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "LOW"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502 Deserialization of untrusted data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-29T08:07:39.510Z",
        "orgId": "455daabc-a392-441d-aa46-37d35189897c",
        "shortName": "NCSC.ch"
      },
      "references": [
        {
          "url": "https://logback.qos.ch/news.html#1.5.33"
        }
      ],
      "solutions": [
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          "lang": "en",
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              "type": "text/html",
              "value": "Upgrade to logback version 1.5.33."
            }
          ],
          "value": "Upgrade to logback version 1.5.33."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Logback deserialization whitelist bypass for java.lang and java.util",
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        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c",
    "assignerShortName": "NCSC.ch",
    "cveId": "CVE-2026-9828",
    "datePublished": "2026-05-28T12:52:45.852Z",
    "dateReserved": "2026-05-28T11:55:19.674Z",
    "dateUpdated": "2026-05-29T08:07:39.510Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}