CVE-2026-39998

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Source
https://cve.org/CVERecord?id=CVE-2026-39998
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39998.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-39998
Aliases
Downstream
Published
2026-06-19T13:04:39.608Z
Modified
2026-07-08T08:13:08.085811043Z
Severity
  • 5.8 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H CVSS Calculator
Summary
Apache APISIX: Identity Injection via forward-auth Plugin Missing Header Cleanup
Details

Improper Input Validation vulnerability in Apache APISIX.

The attacker can take advantage of certain configuration in forward-auth plugin to spoof identity headers. This issue affects Apache APISIX: from 2.12.0 through 3.16.0.

Users are recommended to upgrade to version 3.17.0, which fixes the issue.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "2.12.0"
                },
                {
                    "last_affected": "3.16.0"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "2.12.0"
                },
                {
                    "fixed": "3.16.0"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39998.json",
    "cna_assigner": "apache",
    "cwe_ids": [
        "CWE-20"
    ]
}
References

Affected packages

Git / github.com/apache/apisix

Affected ranges

Type
GIT
Repo
https://github.com/apache/apisix
Events
Introduced
6193a307d1842b25456aa3e42a33674a724fb427
Fixed
9ef2ecab67f652d38365049613610ef649bb4ad0
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "2.12.0"
        },
        {
            "fixed": "3.17.0"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39998.json"