Apache APISIX: forward auth plugin allows header injection_CVE-2026-31908

{
    "lastseen": "",
    "description": "Header injection vulnerability in Apache APISIX.\n\nThe attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers.\nThis issue affects Apache APISIX: from 2.12.0 through 3.15.0.\n\nUsers are recommended to upgrade to version 3.16.0, which fixes the issue.",
    "published": "2026-04-14T08:06:18.026Z",
    "modified": "2026-04-16T12:06:00.176Z",
    "type": "cve",
    "title": "Apache APISIX: forward auth plugin allows header injection",
    "source": "apache",
    "references": "https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b",
    "id": "CVE-2026-31908",
    "bulletinFamily": "",
    "cwe": [
        "CWE-75"
    ],
    "cvelist": null,
    "sourceData": "Apache Software Foundation Apache APISIX 2.12.0",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Apache APISIX",
    "version": "2.12.0",
    "vendor": "Apache Software Foundation",
    "ai_description": "Header injection vulnerability in Apache APISIX's forward-auth plugin",
    "ai_severity": "Critical",
    "ai_vendor": "Apache Software Foundation",
    "ai_product": "Apache APISIX",
    "ai_version": "2.12.0-3.15.0",
    "ai_score": 9.1
}