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CVE-2026-54054— Transmute has full-read SSRF in URL file import (POST /api/files/url) — no host/IP validation, follows redirects

Quick assessment

Affected
transmute-app transmute
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.

Transmute 是一款免费、开源、可自托管的文件转换与压缩工具。在 1.3.0 版本之前，Transmute 的 URL 导入端点 存在服务器端请求伪造（SSRF）漏洞。 该端点所使用的 HTTP 下载器在获取用户提供的 URL 时启用了重定向功能，且未验证目标地址是否解析为公共外部地址。因此，经过身份验证的用户（如果启用了访客用户，访客用户同样可能）可以诱使 Transmute 服务器从其网络位置向内部或云端本地资源发起 HTTP 请求。 由于下载的内容会被存储并可通过 接口后续获取，该漏洞可导致完全读取型

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-54054

Vulnerability Information
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Vulnerability Title
Transmute has full-read SSRF in URL file import (POST /api/files/url) — no host/IP validation, follows redirects
Source: CVE Program / CVE List V5
Vulnerability Description
Transmute is a free, open-source, self-hosted file conversion and compression tool. Prior to version 1.3.0, Transmute's URL import endpoint, `POST /api/files/url`, is vulnerable to Server-Side Request Forgery (SSRF). The HTTP downloader used by this endpoint fetches user-supplied URLs with redirects enabled and does not validate whether the target resolves to a public, external address. As a result, an authenticated user (or guest user if they are enabled) may be able to cause the Transmute server to make HTTP requests to internal or cloud-local resources from the server's network position. Because downloaded content is stored and can later be retrieved through `GET /api/files/{id}`, this issue can result in full-read SSRF rather than blind SSRF. This is fixed in version 1.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
transmute-app transmute < 1.3.0 -

II. Public POCs for CVE-2026-54054

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III. Intelligence Information for CVE-2026-54054

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Other References for CVE-2026-54054 (2)

IV. Related Vulnerabilities

Same weakness: CWE-918

V. Comments for CVE-2026-54054

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