Medium severity · published Apr 2, 2026
CVE-2026-34736
Open edX Platform: Account Activation Bypass via activation_key Exposure in REST API
5.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openedx-platform · openedx
>= maple, < ulmo · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34736
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34736
github.com
https://github.com/openedx/openedx-platform/commit/ad342ae16e6af0b46460ca05f47697ac755feba8
github.com
https://github.com/openedx/openedx-platform/security/advisories/GHSA-m6rg-rp98-4crw
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