FKIE_CVE-2026-85272

Vulnerability from fkie_nvd - Published: 2026-09-18 21:18 - Updated: 2026-09-24 21:20
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Summary
Open edX Platform enables the authoring and delivery of online learning at any scale. From Aspen.1 until Ulmo and Verawood.1, openedx/core/lib/extract_archive.py uses _is_bad_path to validate safe_extractall targets by comparing resolved path strings with startswith instead of comparing path components. A course author or staff user with course import permission can submit a crafted .tar.gz archive through the import_olx flow initiated by cms.djangoapps.contentstore.views.import_export.import_handler. An archive member can therefore escape into a sibling course staging directory whose name shares the attacker's base64 directory prefix, causing limited cross-tenant file corruption. Zip archives are not practically affected because ZipFile.extractall strips parent traversal segments, and the advisory does not establish arbitrary filesystem writes, file reads, or direct code execution. This issue is fixed in Ulmo and Verawood.1.
References
security-advisories@github.comhttps://github.com/openedx/openedx-platform/commit/8422334e2063015a28b6460a34aa4bb4d8ae1ca8
security-advisories@github.comhttps://github.com/openedx/openedx-platform/commit/97de0586d878936c9f97c03fdaa20346ee8eac29
security-advisories@github.comhttps://github.com/openedx/openedx-platform/commit/e552907ff33a7b2e53f99b819123c9dacdfc127a
security-advisories@github.comhttps://github.com/openedx/openedx-platform/releases/tag/release/ulmo.4
security-advisories@github.comhttps://github.com/openedx/openedx-platform/releases/tag/release/verawood.1
security-advisories@github.comhttps://github.com/openedx/openedx-platform/security/advisories/GHSA-6cmm-8875-5pcw
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "openedx-platform",
          "vendor": "openedx",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= release/aspen.1, \u003c release/ulmo.4"
            },
            {
              "status": "affected",
              "version": "\u003e= release/aspen.1, \u003c release/verawood.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Open edX Platform enables the authoring and delivery of online learning at any scale. From Aspen.1 until Ulmo and Verawood.1, openedx/core/lib/extract_archive.py uses _is_bad_path to validate safe_extractall targets by comparing resolved path strings with startswith instead of comparing path components. A course author or staff user with course import permission can submit a crafted .tar.gz archive through the import_olx flow initiated by cms.djangoapps.contentstore.views.import_export.import_handler. An archive member can therefore escape into a sibling course staging directory whose name shares the attacker\u0027s base64 directory prefix, causing limited cross-tenant file corruption. Zip archives are not practically affected because ZipFile.extractall strips parent traversal segments, and the advisory does not establish arbitrary filesystem writes, file reads, or direct code execution. This issue is fixed in Ulmo and Verawood.1."
    }
  ],
  "id": "CVE-2026-85272",
  "lastModified": "2026-09-24T21:20:08.527",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-85272",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-21T16:09:28.591096Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-18T21:18:44.793",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/openedx/openedx-platform/commit/8422334e2063015a28b6460a34aa4bb4d8ae1ca8"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/openedx/openedx-platform/commit/97de0586d878936c9f97c03fdaa20346ee8eac29"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/openedx/openedx-platform/commit/e552907ff33a7b2e53f99b819123c9dacdfc127a"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/openedx/openedx-platform/releases/tag/release/ulmo.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/openedx/openedx-platform/releases/tag/release/verawood.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/openedx/openedx-platform/security/advisories/GHSA-6cmm-8875-5pcw"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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