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    CVE-2026-42858

    Open edX Platform enables the authoring and delivery of online learning at any scale. The sync_provider_data endpoint in SAMLProviderDataViewSet allows authenticated Enterprise Admin users to supply an arbitrary URL via the metadata_url POST parameter. This URL is passed directly to requests.get() in fetch_metadata_xml() without any URL validation, IP filtering, or scheme enforcement. An attacker with Enterprise Admin privileges can force the server to make HTTP requests to internal network services, cloud metadata endpoints (e.g., AWS 169.254.169.254), or other attacker-controlled destinations. This vulnerability is fixed by commit 6fda1f120ff5a590d120ae1180185525f399c6d0 and 70a56246dd9c9df57c596e64bdd8a11b1d9da054.

    Published:May 11, 2026
    Last Modified:May 13, 2026
    EPS:May 11, 2026
    EPSS Score:0.00027
    CVSS Score:8.5

    Affected Products

    Vendor
    Openedx
    Product
    Openedx
    Vendor
    Openedx
    Product
    Openedx-platform

    Exploits

    https://github.com/openedx/openedx-platform/security/advisories/GHSA-328g-7h4g-r2m9https://github.com/openedx/openedx-platform/security/advisories/GHSA-328g-7h4g-r2m9

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High