CVE-2026-34736
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
In Open edX Platform from the maple release to ulmo, an unauthenticated attacker can fully bypass the email verification process. This exploits OAuth2 tokens issued to inactive users and the exposure of activation_key in the REST API response.
Risk Assessment
The risk includes the ability to create fake accounts and gain access to the educational platform without identity verification.
Recommendation
It is recommended to upgrade to the ulmo release, which contains the fix.
Original NVD description (English source)
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.