Is CVE-2026-41715 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-41715 being exploited in the wild.

How severe is CVE-2026-41715?

Medium severity, with a CVSS score of 6.1, published 9 June 2026.

Which products and versions are affected?

io.projectreactor.netty:reactor-netty (Maven) ECOSYSTEM:introduced=1.3.0,fixed=1.3.6; VMware Reactor Netty 1.0.0 through 1.0.51, 1.1.0 through 1.1.35, 1.2.0 through 1.2.17, 1.3.0 through 1.3.5.

Is there a fix for CVE-2026-41715?

Yes. io.projectreactor.netty:reactor-netty (Maven): upgrade to 1.3.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-41715 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-41715?

Check whether you run io.projectreactor.netty:reactor-netty (Maven) or VMware Reactor Netty at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-41715: VMware Reactor Netty credential leak during HTTP redirect

CVE-2026-41715 · Severity: medium · CVSS 6.1 · Published 2026-06-09

Reactor Netty is a networking library used by Java applications to handle web traffic. A security issue exists where the library may accidentally send sensitive login credentials to an insecure (unencrypted) website if it is automatically redirected from a secure one. This could allow an attacker to intercept and steal user credentials or authentication tokens.

Technologies: VMware Reactor Netty. Vendors: Maven, VMware.

Quick answers

Is CVE-2026-41715 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-41715 being exploited in the wild.
How severe is CVE-2026-41715?: Medium severity, with a CVSS score of 6.1, published 9 June 2026.
Which products and versions are affected?: io.projectreactor.netty:reactor-netty (Maven) ECOSYSTEM:introduced=1.3.0,fixed=1.3.6; VMware Reactor Netty 1.0.0 through 1.0.51, 1.1.0 through 1.1.35, 1.2.0 through 1.2.17, 1.3.0 through 1.3.5.
Is there a fix for CVE-2026-41715?: Yes. io.projectreactor.netty:reactor-netty (Maven): upgrade to 1.3.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-41715 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-41715?: Check whether you run io.projectreactor.netty:reactor-netty (Maven) or VMware Reactor Netty at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

io.projectreactor.netty:reactor-netty (Maven): upgrade to 1.3.6 or later

# set io.projectreactor.netty:reactor-netty to 1.3.6 in your pom.xml or build.gradle

Technical details

A credential leak vulnerability (CWE-522) exists in the Reactor Netty HTTP client during protocol downgrade redirects. When the client is explicitly configured to follow redirects, it may fail to strip sensitive authentication headers when transitioning from an HTTPS endpoint to an HTTP endpoint. An attacker who can trigger or influence such a redirect could capture these credentials in plaintext over the network. The issue is rooted in the header handling logic within HttpClientConnect.java. Patches are available in versions 1.2.18 and 1.3.6.

Affected products

Spring Reactor Netty 1.0.0 through 1.0.51; 1.1.0 through 1.1.35; 1.2.0 through 1.2.17; 1.3.0 through 1.3.5

Identifiers

CVE-2026-41715
GHSA-pfc9-2cqg-9wq6

Timeline

2026-06-09: disclosed
2026-06-09: advisory

References

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