CVE-2026-85272

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Source
https://cve.org/CVERecord?id=CVE-2026-85272
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85272.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-85272
Aliases
  • GHSA-6cmm-8875-5pcw
Published
2026-09-18T20:27:44Z
Modified
2026-09-22T03:31:01Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Open edX Platform: Path traversal via prefix-bypass in safe_extractall Path Validation
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-22"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85272.json"
}
References

Affected packages

Git / github.com/openedx/openedx-platform

Affected ranges

Type
GIT
Repo
https://github.com/openedx/openedx-platform
Events
Introduced
142bb24065fa23eeaf9806a560762aa00013f296
Fixed
8422334e2063015a28b6460a34aa4bb4d8ae1ca8
Fixed
97de0586d878936c9f97c03fdaa20346ee8eac29
Fixed
e552907ff33a7b2e53f99b819123c9dacdfc127a
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  ">= release/aspen.1, < release/ulmo.4"
        },
        {
            "last_affected":  ">= release/aspen.1, < release/ulmo.4"
        },
        {
            "introduced":  ">= release/aspen.1, < release/verawood.1"
        },
        {
            "last_affected":  ">= release/aspen.1, < release/verawood.1"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

>= release/aspen.*
>= release/aspen.1, < release/ulmo.4
>= release/aspen.1, < release/verawood.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85272.json"