Apache APISIX up to 3.16.0 Configuration cross-site request forgery

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Apache APISIX up to 3.16.0. The impacted element is an unknown function of the component Configuration Handler. The manipulation leads to cross-site request forgery. This vulnerability is documented as CVE-2026-49871. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache APISIX up to 3.16.0. It has been rated as problematic. This issue affects an unknown functionality of the component Configuration Handler. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. Impacted is integrity. The summary by CVE is:

Cross-Site Request Forgery (CSRF) vulnerability in the cas-auth plugin under default configurations. This defect allows a remote attacker that manages to send a victim to a webpage controlled by them can cause the victim's browser to become authenticated as a different identity. Actions the victim takes upstream are then attributed to attackers identity. This issue affects Apache APISIX: from 3.0.0 through 3.16.0. Users are recommended to upgrade to version 3.17.0, which fixes the issue.

The advisory is shared at lists.apache.org. The identification of this vulnerability is CVE-2026-49871 since 06/02/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/19/2026).

Upgrading to version 3.17.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38025). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Apache

Name

• APISIX

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16.0

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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