SSRF in Transmute-App Transmute
CVE-2026-54054
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Transmute-app Transmute — versions < 1.3.0
Weakness classification (CWE)
References
- https://github.com/transmute-app/transmute/security/advisories/GHSA-89m5-mvmx-7xrf (x_refsource_CONFIRM)
- https://github.com/transmute-app/transmute/releases/tag/v1.3.0 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-54054?
- CVE-2026-54054 is a medium-severity vulnerability in Transmute-App Transmute, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-09-10.
- How severe is CVE-2026-54054?
- Medium severity. CVSS v3 base score is 6.5 out of 10.