CVE-2026-43624
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
F5-TTS through version 1.1.20 has a path traversal vulnerability in the finetune Gradio handlers. An unauthenticated attacker can write arbitrary files by passing unsanitized project names to os.path.join(), allowing bypass of the base directory and file creation at arbitrary locations.
Risk Assessment
An attacker can overwrite critical system files or inject malicious content, potentially leading to server compromise.
Recommendation
Upgrade F5-TTS to a version later than 1.1.20. As a workaround, validate project names before using them in path operations.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

