CVE-2026-34087— Users API leaks whether privileged users have their user groups disabled for lack of 2FA
Possible ATT&CK Techniques 1AI
T1530 · Data from Cloud StorageAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Wikimedia Foundation | OATHAuth | *< 1.43.7, 1.44.4, 1.45.2 | affected |
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I. Basic Information for CVE-2026-34087
Vulnerability Information
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Vulnerability Title
Users API leaks whether privileged users have their user groups disabled for lack of 2FA
Source: NVD (National Vulnerability Database)
Vulnerability Description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation OATHAuth. This issue affects OATHAuth: from * before 1.43.7, 1.44.4, 1.45.2.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Wikimedia OATHAuth 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wikimedia OATHAuth是Wikimedia基金会的一个双重身份验证扩展。 Wikimedia OATHAuth 1.43.7之前版本、1.44.4版本和1.45.2版本存在信息泄露漏洞，该漏洞源于敏感信息泄露给未授权攻击者。
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 |
|---|---|---|---|---|
| Wikimedia Foundation | OATHAuth | * ~ 1.43.7, 1.44.4, 1.45.2 | - |
II. Public POCs for CVE-2026-34087
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Wikimedia Foundation · 2026-05-11 · 11 CVEs total
| CVE-2026-34090 | Suggested investigations: Handle suppressed usernames | |
| CVE-2026-34089 | Memory leak in Scribunto causes runJobs.php to run out of memory | |
| CVE-2026-34092 | Block UI elements in 'tools'-sidebar shows presence of an autoblocked IP | |
| CVE-2026-34091 | User localization leaked by AbuseFilter + EventStream | |
| CVE-2026-34086 | AbuseFilter misuses ::userCanBitfield, exposing access-controlled information | |
| CVE-2026-34093 | Special:UserRights allows viewing user rights from private wiki | |
| CVE-2026-34094 | Customized help link for page protection indicator is relative to subpage name, because th | |
| CVE-2026-34095 | action=raw with Special:Mypage subpage title responds with "Content-Type: text/html" on ct | |
| CVE-2026-34088 | RecentChanges entries expose suppressed content via generated log page html | |
| CVE-2026-5266 | Wikimedia Echo 信息泄露漏洞 |
IV. Related Vulnerabilities
Same vendor: Wikimedia Foundation
- CVE-2026-5266
Wikimedia Echo 信息泄露漏洞 - CVE-2026-34095
action=raw with Special:Mypage subpage title responds with " - CVE-2026-34094
Customized help link for page protection indicator is relati - CVE-2026-34093
Special:UserRights allows viewing user rights from private w - CVE-2026-34092
Block UI elements in 'tools'-sidebar shows presence of an au
Same weakness: CWE-200
- CVE-2026-8750
h2oai h2o-3 ImportFile API PersistNFS.java importFiles infor - CVE-2026-45351
Open WebUI: Exposure of System Prompt to Regular User [Non-A - CVE-2026-45387
Open WebUI: Sharing models for others to use (read permissio - CVE-2026-41960
Calls权限控制漏洞影响可用性 - CVE-2026-41615
Microsoft Authenticator Information Disclosure Vulnerability
V. Comments for CVE-2026-34087
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