CVE-2026-42858
Open edX Platform: Server-Side Request Forgery (SSRF) in SAML Provider Data Sync Endpoint
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.
INFO
Published Date :
May 11, 2026, 6:16 p.m.
Last Modified :
May 13, 2026, 2:53 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Open edX to a version that includes the fix.
- Implement URL validation and scheme enforcement.
- Filter IP addresses for external requests.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42858.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42858 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42858
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42858 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-42858 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
May. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:openedx:openedx:*:*:*:*:*:*:*:* versions up to (excluding) 2026-04-24 Added Reference Type GitHub, Inc.: https://github.com/openedx/openedx-platform/commit/6fda1f120ff5a590d120ae1180185525f399c6d0 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/openedx/openedx-platform/commit/70a56246dd9c9df57c596e64bdd8a11b1d9da054 Types: Patch Added Reference Type CISA-ADP: https://github.com/openedx/openedx-platform/security/advisories/GHSA-328g-7h4g-r2m9 Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/openedx/openedx-platform/security/advisories/GHSA-328g-7h4g-r2m9 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 12, 2026
Action Type Old Value New Value Added Reference https://github.com/openedx/openedx-platform/security/advisories/GHSA-328g-7h4g-r2m9 -
New CVE Received by [email protected]
May. 11, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N Added CWE CWE-918 Added Reference https://github.com/openedx/openedx-platform/commit/6fda1f120ff5a590d120ae1180185525f399c6d0 Added Reference https://github.com/openedx/openedx-platform/commit/70a56246dd9c9df57c596e64bdd8a11b1d9da054 Added Reference https://github.com/openedx/openedx-platform/security/advisories/GHSA-328g-7h4g-r2m9