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CVE-2026-34985— LORIS has incorrect access checks in media module

Quick assessment

Affected
aces Loris
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.

LORIS Neuroimaging Platform是ACElab开源的一个神经影像平台。 LORIS Neuroimaging Platform 27.0.3之前版本和28.0.1之前版本存在安全漏洞，该漏洞源于媒体模块后端缺少访问检查，可能导致未授权访问文件。

CVSS 6.3 · Medium EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-34985

Vulnerability Information
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Vulnerability Title
LORIS has incorrect access checks in media module
Source: CVE Program / CVE List V5
Vulnerability Description
LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 16.1.0 to before 27.0.3 and 28.0.1, While the frontend of the media module filters files that the user should not have access to, the backend was not applying access checks and it would be possible for someone who should not have access to a file to access it if they know the filename. This vulnerability is fixed in 27.0.3 and 28.0.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
LORIS Neuroimaging Platform 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LORIS Neuroimaging Platform是ACElab开源的一个神经影像平台。 LORIS Neuroimaging Platform 27.0.3之前版本和28.0.1之前版本存在安全漏洞，该漏洞源于媒体模块后端缺少访问检查，可能导致未授权访问文件。
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
aces Loris >= 16.1.0, < 27.0.3 -

II. Public POCs for CVE-2026-34985

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III. Intelligence Information for CVE-2026-34985

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Same Patch Batch · aces · 2026-04-08 · 8 CVEs total

CVE-2026-35169 8.7 HIGH LORIS has potential cross-site scripting in help_editor module
CVE-2026-35446 7.7 HIGH LORIS has a path traversal in FilesDownloadHandler
CVE-2026-34392 7.5 HIGH LORIS has a path traversal in static router
CVE-2026-33350 7.5 HIGH LORIS has a SQL injection in MRI feedback popup
CVE-2026-35403 6.5 MEDIUM LORIS has potential cross-site scripting in survey_accounts module
CVE-2026-35165 6.3 MEDIUM LORIS has incorrect access checks in document_repository
CVE-2026-35400 3.5 LOW LORIS incorrectly trusts user input in publication module

IV. Related Vulnerabilities

Same product: Loris
Same vendor: aces
Same weakness: CWE-639

V. Comments for CVE-2026-34985

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