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CVE-2026-34736— Open edX Platform: Account Activation Bypass via activation_key Exposure in REST API

Quick assessment

Affected
openedx openedx-platform
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open edX Platform是Open edX开源的一套开源的课程管理系统（CMS）。该系统可用于MOOCs（大规模网络开放课程）以及较小的课程和培训模块。 Open edX Platform maple版本至ulmo之前版本存在授权问题漏洞，该漏洞源于OAuth2密码授权向非活跃用户颁发令牌且activation_key在REST API响应中暴露，可能导致完全绕过电子邮件验证过程。

CVSS 5.3 · Medium EPSS 0.35% · P27
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I. Basic Information for CVE-2026-34736

Vulnerability Information
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Vulnerability Title
Open edX Platform: Account Activation Bypass via activation_key Exposure in REST API
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Open edX Platform 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open edX Platform是Open edX开源的一套开源的课程管理系统（CMS）。该系统可用于MOOCs（大规模网络开放课程）以及较小的课程和培训模块。 Open edX Platform maple版本至ulmo之前版本存在授权问题漏洞，该漏洞源于OAuth2密码授权向非活跃用户颁发令牌且activation_key在REST API响应中暴露，可能导致完全绕过电子邮件验证过程。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
openedx openedx-platform >= maple, < ulmo -

II. Public POCs for CVE-2026-34736

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III. Intelligence Information for CVE-2026-34736

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Patches & Fixes for CVE-2026-34736 (1)

Vendor Advisories for CVE-2026-34736 (1)

IV. Related Vulnerabilities

Same product: openedx-platform
Same vendor: openedx
Same weakness: CWE-287

V. Comments for CVE-2026-34736

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