CVE-2026-54054Public exploitNetwork attack vector

Full-read SSRF via unvalidated redirected URL import

Published Sep 10, 2026 · Updated Sep 10, 2026

Server-side request forgery in Transmute before 1.3.0 allows remote authenticated users to read internal HTTP resources via URL import. The POST /api/files/url path passes a user-controlled URL to HttpDownloader.download, which follows redirects and streams responses without validating resolved destinations. Any authenticated account, or a guest when guest access is enabled, can store and retrieve content reachable from the server, including loopback, cloud-local, and internal services.

CVSS severity6.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Transmute before 1.3.0 allows remote authenticated users to read internal HTTP resources via URL import. The POST /api/files/url path passes a user-controlled URL to HttpDownloader.download, which follows redirects and streams responses without validating resolved destinations. Any authenticated account, or a guest when guest access is enabled, can store and retrieve content reachable from the server, including loopback, cloud-local, and internal services.

The record

CVE
CVE-2026-54054
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
Transmute
Product
Transmute
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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=< 1.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Transmute · Transmuteversion=< 1.3.0

Published CVSS scores

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

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
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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