Path Traversal Vulnerability in F5-TTS by SWivid
CVE-2026-43624

8.8HIGH

Key Information:

Vendor

Swivid

Status
F5-tts
Vendor
CVE Published:
1 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-43624?

F5-TTS versions up to 1.1.20 are susceptible to a path traversal vulnerability within the finetune Gradio handlers. This flaw permits unauthenticated attackers to write arbitrary files by manipulating unsanitized user input for project names, which are directly passed to the os.path.join() function. As a result, attackers can exploit this vulnerability by providing absolute path arguments, allowing them to bypass the base directory restrictions. This malicious action enables them to create directories and write JSON content at any writable filesystem path under the control of the server process.

Affected Version(s)

F5-TTS 0 <= 1.1.20

F5-TTS 0 <= 1.1.20

F5-TTS 2f53ded68e5f69e248ceb200a51ef4d1dc647936

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-43624 - Proof of Concept

References

https://github.com/SWivid/F5-TTS/issues/1293
technical-descriptionexploit
https://github.com/SWivid/F5-TTS/pull/1294
issue-tracking
https://github.com/SWivid/F5-TTS/commit/2f53ded68e5f69e24...
patch

CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

YU SUN
.