CVE-2026-43624: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in SWivid F5-TTS
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.
AI Analysis
Technical Summary
CVE-2026-43624 is a path traversal vulnerability affecting SWivid's F5-TTS product through version 1.1.20. The issue exists in the finetune Gradio handlers where unsanitized user-supplied project names are concatenated with base paths using os.path.join() without proper validation. This allows attackers to provide absolute paths, overriding the base directory and enabling arbitrary file creation with attacker-controlled JSON content at any writable location on the server. The vulnerability requires no authentication and has a CVSS 4.0 score of 8.8, indicating high severity.
Potential Impact
An unauthenticated attacker can write arbitrary files to any location writable by the server process, potentially leading to code execution, data corruption, or denial of service depending on the files overwritten or created. This compromises the integrity and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the vulnerable finetune Gradio handlers and limit filesystem permissions of the F5-TTS server process to minimize potential damage from arbitrary file writes.
CVE-2026-43624: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in SWivid F5-TTS
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.
CVSS v4.0
Score 8.8high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-43624 is a path traversal vulnerability affecting SWivid's F5-TTS product through version 1.1.20. The issue exists in the finetune Gradio handlers where unsanitized user-supplied project names are concatenated with base paths using os.path.join() without proper validation. This allows attackers to provide absolute paths, overriding the base directory and enabling arbitrary file creation with attacker-controlled JSON content at any writable location on the server. The vulnerability requires no authentication and has a CVSS 4.0 score of 8.8, indicating high severity.
Potential Impact
An unauthenticated attacker can write arbitrary files to any location writable by the server process, potentially leading to code execution, data corruption, or denial of service depending on the files overwritten or created. This compromises the integrity and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the vulnerable finetune Gradio handlers and limit filesystem permissions of the F5-TTS server process to minimize potential damage from arbitrary file writes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-05-01T18:22:45.640Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1de306e29bf47b503a54f1
Added to database: 06/01/2026, 19:52:38 UTC
Last enriched: 07/15/2026, 10:32:50 UTC
Last updated: 07/26/2026, 08:52:02 UTC
Views: 178
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