CVE-2026-78242: Apache APISIX: data-mask may fail to redact request headers in logger output

[Abhishek Choudhary <shreemaanabhishek () apache org>]

Severity: 
    CVSS 4.0: 5.7 (medium) CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Affected versions:

- Apache APISIX 3.17.0

Description:

Insertion of sensitive information into log file vulnerability in Apache APISIX.



This vulnerability can cause the unmasked header value to be written to the log sink under a certain response 
structure. 



This issue affects Apache APISIX: 3.17.0.



Users are recommended to upgrade to version 3.18.0, which fixes the issue.

Credit:

Jonas Schültke (reporter)

References:

https://apisix.apache.org
https://www.cve.org/CVERecord?id=CVE-2026-78242