CVE-2026-31908: CWE-75 Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) in Apache Software Foundation Apache APISIX
Header injection vulnerability in Apache APISIX. The attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers. This issue affects Apache APISIX: from 2.12.0 through 3.15.0. Users are recommended to upgrade to version 3.16.0, which fixes the issue.
AI Analysis
Technical Summary
Apache APISIX versions 2.12.0 through 3.15.0 contain a header injection vulnerability (CWE-75) in the forward-auth plugin due to failure to sanitize special elements properly. This allows an attacker to inject malicious headers, potentially compromising confidentiality and integrity of data processed by the system. The vulnerability is tracked as CVE-2026-31908 with a CVSS v3.1 score of 9.1 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N). The vendor recommends upgrading to version 3.16.0 to remediate the issue.
Potential Impact
Successful exploitation can lead to injection of malicious headers, resulting in high confidentiality and integrity impact. The vulnerability does not affect availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Users should upgrade Apache APISIX to version 3.16.0, which fixes this header injection vulnerability. Patch status is confirmed by the vendor's recommendation to upgrade. No alternative mitigations or temporary fixes are indicated.
CVE-2026-31908: CWE-75 Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) in Apache Software Foundation Apache APISIX
Description
Header injection vulnerability in Apache APISIX. The attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers. This issue affects Apache APISIX: from 2.12.0 through 3.15.0. Users are recommended to upgrade to version 3.16.0, which fixes the issue.
CVSS v3.1
Score 9.1critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Apache APISIX versions 2.12.0 through 3.15.0 contain a header injection vulnerability (CWE-75) in the forward-auth plugin due to failure to sanitize special elements properly. This allows an attacker to inject malicious headers, potentially compromising confidentiality and integrity of data processed by the system. The vulnerability is tracked as CVE-2026-31908 with a CVSS v3.1 score of 9.1 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N). The vendor recommends upgrading to version 3.16.0 to remediate the issue.
Potential Impact
Successful exploitation can lead to injection of malicious headers, resulting in high confidentiality and integrity impact. The vulnerability does not affect availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Users should upgrade Apache APISIX to version 3.16.0, which fixes this header injection vulnerability. Patch status is confirmed by the vendor's recommendation to upgrade. No alternative mitigations or temporary fixes are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-03-10T08:20:51.948Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69ddf7fa82d89c981f0815e0
Added to database: 4/14/2026, 8:16:58 AM
Last enriched: 4/22/2026, 6:32:12 AM
Last updated: 5/29/2026, 6:21:25 AM
Views: 91
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