CVE-2026-35165Network attack vector

Authenticated file disclosure via missing backend authorization

Published Apr 8, 2026 · Updated Apr 8, 2026

Incorrect authorization in ACElab LORIS 21.0.0 through 27.0.2 and 28.0.0 allows remote authenticated users to download restricted files. The document_repository download handler in modules/document_repository/php/files.class.inc serves a requested filename without verifying that the user belongs to the file's assigned site. A valid account and knowledge or brute-force discovery of a stored filename are required, exposing only files reachable through the affected repository endpoint.

CVSS severity6.3
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in ACElab LORIS 21.0.0 through 27.0.2 and 28.0.0 allows remote authenticated users to download restricted files. The document_repository download handler in modules/document_repository/php/files.class.inc serves a requested filename without verifying that the user belongs to the file's assigned site. A valid account and knowledge or brute-force discovery of a stored filename are required, exposing only files reachable through the affected repository endpoint.

The record

CVE
CVE-2026-35165
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
ACElab
Product
LORIS
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 21.0.0, < 27.0.3
  2. Affected versionversion=>= 28.0.0, < 28.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ACElab · LORISversion=>= 21.0.0, < 27.0.3; version=>= 28.0.0, < 28.0.1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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