Information disclosure in Reactor Netty - CVE-2026-41715
Published: August 28, 2026
Vulnerability identifier: #VU146286
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-41715
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose credentials.
The vulnerability exists due to improper handling of credential forwarding in the Reactor Netty HTTP client redirect handling when following redirects from a secure endpoint to an insecure endpoint. A remote attacker can trigger a protocol downgrade redirect to disclose credentials.
The HTTP client must be explicitly configured to follow redirects, and user interaction is required.
Affected software
Reactor Netty
How to mitigate CVE-2026-41715
Install security update from vendor's website.
Reactor Netty - addressed in versions 1.0.52, 1.1.36, 1.2.18, 1.3.6