EUVD-2026-33744
GHSA-93wx-x4m2-5c8f
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Arbitrary file write in F5-TTS through 1.1.20 allows unauthenticated remote attackers to create directories and write attacker-controlled JSON anywhere the server process has write access by abusing unsanitized project_name parameters in the finetune Gradio interface. The flaw stems from passing user input directly to os.path.join() - supplying an absolute path bypasses the intended base directory entirely. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The F5-TTS finetune Gradio web UI (src/f5_tts/train/finetune_gradio.py, the create_data_project handler and related project-name endpoints) must be running and reachable by the attacker over the network - no authentication, user interaction, or non-default configuration toggle is required once the UI is exposed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 4.0 vector AV:N/AC:L/AT:N/PR:N/UI:N with VI:H captures the core risk accurately: network-reachable, no authentication, no user interaction, high integrity impact, low availability impact, and no confidentiality impact (the bug writes files, it does not read them). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker locates an internet-exposed F5-TTS finetune Gradio interface (common on shared GPU/cloud instances or via launch(share=True) tunnels), then invokes the project-creation handler with project_name set to an absolute path such as /root/.ssh or /etc/cron.d/pwn. The server's os.makedirs() and subsequent JSON writes create the attacker-controlled directory and file at that location, and because POC code is publicly available on the GitHub issue, this can be reproduced with a single HTTP request and pivoted to code execution by dropping a cron entry or overwriting a Python module loaded by the training process. |
| Remediation | Upstream fix available (PR https://github.com/SWivid/F5-TTS/pull/1294 and commit https://github.com/SWivid/F5-TTS/commit/2f53ded68e5f69e248ceb200a51ef4d1dc647936); a released patched version was not independently confirmed in the input data, so users should pin to a build that includes that commit or apply the patch manually until SWivid tags a release above 1.1.20. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all F5-TTS instances running version 1.1.20 or earlier and restrict network access to trusted networks only. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Share
External POC / Exploit Code
Leaving vuln.today