What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-10 · updated 2026-09-30
• Weakness: CWE-918

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.

Affected products

• transmute-app transmute: before 1.3.0

References

• https://github.com/transmute-app/transmute/releases/tag/v1.3.0
• https://github.com/transmute-app/transmute/security/advisories/GHSA-89m5-mvmx-7xrf

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