CVE-2026-32101Public exploitNetwork attack vector

Visitor-level storage takeover via missing await

Published Mar 11, 2026 · Updated Mar 11, 2026

Incorrect authorization in StudioCMS S3 Storage Manager before 0.3.1 allows remote authenticated users to control S3 files. The POST and PUT handlers negate the Promise returned by isAuthorized() without awaiting it, so the truthy Promise prevents the 401 branch from running. A visitor-role session is sufficient to list, upload, rename, or delete bucket objects and generate presigned download URLs.

CVSS severity7.6
High
EPSS probability0.18%
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 StudioCMS S3 Storage Manager before 0.3.1 allows remote authenticated users to control S3 files. The POST and PUT handlers negate the Promise returned by isAuthorized() without awaiting it, so the truthy Promise prevents the 401 branch from running. A visitor-role session is sufficient to list, upload, rename, or delete bucket objects and generate presigned download URLs.

The record

CVE
CVE-2026-32101
Published
Mar 11, 2026
Updated
Mar 11, 2026
Vendor
StudioCMS
Product
StudioCMS S3 Storage Manager
Classifications
CWE-863, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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=< 0.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

StudioCMS · StudioCMS S3 Storage Managerversion=< 0.3.1

Published CVSS scores

7.6GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

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Your stack

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