{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Windows",
            "Linux"
          ],
          "product": "Octopus Server",
          "vendor": "Octopus Deploy",
          "versions": [
            {
              "lessThan": "2026.1.674",
              "status": "affected",
              "version": "2023.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "2026.1.674",
              "status": "affected",
              "version": "2026.1",
              "versionType": "custom"
            },
            {
              "lessThan": "2026.2.973",
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              "version": "2026.2",
              "versionType": "custom"
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              "lessThan": "2026.3.5839",
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              "version": "2026.3",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "This vulnerability was found by siddharthkathole62bb60"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "In affected versions of Octopus Server, a user with permission to upload a malicious nuget package is able to deploy a script step so the script executes outside of the parent directory."
            }
          ],
          "value": "In affected versions of Octopus Server, a user with permission to upload a malicious nuget package is able to deploy a script step so the script executes outside of the parent directory."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "HIGH",
            "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:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Path Traversal in Octopus Server",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-27T13:15:22.608Z",
        "orgId": "6f4f8c89-ef06-4bae-a2a5-6734ddf76272",
        "shortName": "Octopus"
      },
      "references": [
        {
          "url": "https://advisories.octopus.com/post/2026/sa2026-14/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
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  },
  "cveMetadata": {
    "assignerOrgId": "6f4f8c89-ef06-4bae-a2a5-6734ddf76272",
    "assignerShortName": "Octopus",
    "cveId": "CVE-2026-12887",
    "datePublished": "2026-10-27T13:15:22.608Z",
    "dateReserved": "2026-06-22T10:55:01.254Z",
    "dateUpdated": "2026-10-27T13:15:22.608Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}