Vulnerability · Published Apr 2, 2026 · Assigned by GitHub_M
CVE-2026-34736Open edX Platform: Account Activation Bypass via activation_key Exposure in REST API
Medium 5.3
In plain English
A medium-severity improper authentication in openedx-platform from openedx. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Official description
Open edX Platform enables the authoring and delivery of online learning at any scale. From the maple release to before the ulmo release, an unauthenticated attacker can fully bypass the email verification process by combining two issues: the OAuth2 password grant issuing tokens to inactive users (documented behavior) and the activation_key being exposed in the REST API response at /api/user/v1/accounts/. This issue has been patched in the ulmo release.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| openedx | openedx-platform | >= maple, < ulmo |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N