Advisory severityMedium5.3Red Hat Linux

Medium [CVE-2026-59897] Information disclosure due to incorrect header de-duplication in AWS API Gateway v1 adapter

This medium-severity Red Hat Linux advisory covers CVE-2026-59897 affecting Migration Toolkit for Applications 8, Red Hat Ansible Automation Platform 2, Red Hat Developer Hub.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-59897 Source published Jul 8, 2026Source updated Jul 8, 2026

VulniPulse record published Jul 28, 2026Record updated Jul 29, 2026

CVE-2026-59897

Affected products & platforms

Red Hat LinuxUnclassified

Open source advisory

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Summary

Hono is a Web application framework that provides support for any JavaScript runtime.

From 4.3.3 before 4.12.27, the AWS API Gateway v1 adapter can drop a distinct repeated request header value because it de-duplicates values using a substring comparison instead of an exact match, so middleware or application logic that depends on the complete X-Forwarded-For chain, rate limiting, audit logging, or proxy-chain validation can receive incomplete data.

This issue is fixed in version 4.12.27. Consequently, this could result in information disclosure or the bypass of security controls.

Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N). Weakness: CWE-1289.

Affected Red Hat products: Migration Toolkit for Applications 8; Red Hat Ansible Automation Platform 2; Red Hat Developer Hub; Red Hat OpenShift Dev Spaces. Red Hat lists Red Hat Hardened Images as not affected.

Red Hat does not currently list a fixing RHSA for this CVE.

Affected versions

< 4.3.3
< 4.12.27

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Fixed versions

4.12.27

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Mitigation

Upgrade to a fixed release: 4.12.27. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Discussion(0)

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