CVE-2026-28225Network attack vector

Cross-library file tampering via missing policy scope

Published Feb 26, 2026 · Updated Feb 26, 2026

Authorization bypass in Manyfold before 0.133.1 allows remote authenticated users to modify or delete files in restricted model libraries. The ModelFilesController get_model method resolves an attacker-controlled model_id with Model.find_param instead of policy_scope(Model).find_param, so Pundit does not restrict the parent model to accessible records. Contributor access is enough to reach model-file endpoints and bulk-edit, delete, or trigger conversion of files outside the permitted library.

CVSS severity5.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authorization bypass in Manyfold before 0.133.1 allows remote authenticated users to modify or delete files in restricted model libraries. The ModelFilesController get_model method resolves an attacker-controlled model_id with Model.find_param instead of policy_scope(Model).find_param, so Pundit does not restrict the parent model to accessible records. Contributor access is enough to reach model-file endpoints and bulk-edit, delete, or trigger conversion of files outside the permitted library.

The record

CVE
CVE-2026-28225
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Manyfold
Product
Manyfold
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 0.133.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Manyfold · Manyfoldversion=< 0.133.1

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo