Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openedx | Openedx | < 2026-04-24 |
Related Weaknesses (CWE)
References
- https://github.com/openedx/openedx-platform/commit/6fda1f120ff5a590d120ae1180185Patch
- https://github.com/openedx/openedx-platform/commit/70a56246dd9c9df57c596e64bdd8aPatch
- https://github.com/openedx/openedx-platform/security/advisories/GHSA-328g-7h4g-rExploitVendor Advisory
- https://github.com/openedx/openedx-platform/security/advisories/GHSA-328g-7h4g-rExploitVendor Advisory
FAQ
What is CVE-2026-42858?
CVE-2026-42858 is a vulnerability with a CVSS score of 8.5 (HIGH). 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 a...
How severe is CVE-2026-42858?
CVE-2026-42858 has been rated HIGH with a CVSS base score of 8.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42858?
Check the references section above for vendor advisories and patch information. Affected products include: Openedx Openedx.