What is CVE-2026-42858?

CVE-2026-42858 is a high-severity vulnerability in Openedx, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.5/10. Published 2026-05-11.

How severe is CVE-2026-42858?

High severity. CVSS v3 base score is 8.5 out of 10.

SSRF in Openedx

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 PO…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (9.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.

Affected products

Openedx
Openedx Openedx-platform — versions < 6fda1f120ff5a590d120ae1180185525f399c6d0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-42858?: CVE-2026-42858 is a high-severity vulnerability in Openedx, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.5/10. Published 2026-05-11.
How severe is CVE-2026-42858?: High severity. CVSS v3 base score is 8.5 out of 10.