---
id: CVE-2026-78242
title: "Insertion of sensitive information into log file vulnerability in Apache APISIX.\n\n\n\nThis vulnerability can cause the unmasked header value to be written to the log sink under a certain response structure.\_\n\n\n\nThis issue affects Apache AP…"
summary: "Insertion of sensitive information into log file vulnerability in Apache APISIX.\n\n\n\nThis vulnerability can cause the unmasked header value to be written to the log sink under a certain response structure.\_\n\n\n\nThis issue affects Apache AP…"
severity: medium
cvss: 5.7
cvssVector: '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'
cwe:
  - CWE-532
vendor: Apache Software Foundation
product: Apache APISIX
affected:
  - apache_apisix 3.17.0
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T12:54:27.463'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78242'
references:
  - url: 'https://lists.apache.org/thread.html/qxzsyw1pbgxg4sqkc4t2g8h4w2q0mvsn'
    label: security@apache.org
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-01T11:42:53.817Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.