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Description

F5-TTS through version 1.1.20 contains a path traversal vulnerability in the finetune Gradio handlers that allows unauthenticated attackers to write arbitrary files by passing unsanitized user-supplied project names directly to os.path.join() without validating the resulting path stays within the intended base directory. Attackers can supply absolute path arguments such as /tmp/EVIL to override the base directory entirely and create arbitrary directories with attacker-controlled JSON content at any filesystem path writable by the server process.

PUBLISHED Reserved 2026-05-01 | Published 2026-06-01 | Updated 2026-06-01 | Assigner VulnCheck




HIGH: 8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

HIGH: 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Problem types

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

Default status
affected

Any version
affected

2f53ded68e5f69e248ceb200a51ef4d1dc647936 (git)
unaffected

Credits

YU SUN finder

References

github.com/SWivid/F5-TTS/issues/1293 technical-description exploit

github.com/SWivid/F5-TTS/pull/1294 issue-tracking

github.com/...ommit/2f53ded68e5f69e248ceb200a51ef4d1dc647936 patch

www.vulncheck.com/...-finetune-gradio-py-create-data-project third-party-advisory

cve.org (CVE-2026-43624)

nvd.nist.gov (CVE-2026-43624)

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