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CVE-2026-41715— Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect

Quick assessment

Affected
Spring Reactor Netty
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

VMware Reactor Netty是美国威睿（VMware）公司的一个提供基于 Netty 框架的非阻塞和背压就绪的 TCP/HTTP/UDP/QUIC 客户端和服务器。 Spring Reactor Netty 1.0.0至1.0.51版本、1.1.0至1.1.35版本、1.2.0至1.2.17版本和1.3.0至1.3.5版本存在安全漏洞，该漏洞源于HTTP重定向从安全端点到不安全端点时，可能导致凭据泄露。

CVSS 6.1 · Medium EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 4

VendorProduct Version RangeStatus
Spring Reactor Netty 1.0.0< 1.0.52 affected
1.1.0< 1.1.36 affected
1.2.0< 1.2.17.1 affected
1.3.0< 1.3.15.1 affected
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I. Basic Information for CVE-2026-41715

Vulnerability Information
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Vulnerability Title
Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect
Source: CVE Program / CVE List V5
Vulnerability Description
In specific scenarios involving HTTP redirects from a secure to an insecure endpoint, the Reactor Netty HTTP client may leak credentials. In order for this to happen, the HTTP client must have been explicitly configured to follow redirects. Affected versions: 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
多款产品安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VMware Reactor Netty是美国威睿（VMware）公司的一个提供基于 Netty 框架的非阻塞和背压就绪的 TCP/HTTP/UDP/QUIC 客户端和服务器。 Spring Reactor Netty 1.0.0至1.0.51版本、1.1.0至1.1.35版本、1.2.0至1.2.17版本和1.3.0至1.3.5版本存在安全漏洞，该漏洞源于HTTP重定向从安全端点到不安全端点时，可能导致凭据泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Spring Reactor Netty 1.0.0 ~ 1.0.52 -

II. Public POCs for CVE-2026-41715

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III. Intelligence Information for CVE-2026-41715

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Vendor Advisories for CVE-2026-41715 (1)

Same Patch Batch · Spring · 2026-06-09 · 51 CVEs total

CVE-2026-41731 8.1 HIGH In Spring for Apache Kafka, overly broad trusted-package matching in header mappers expose
CVE-2026-41732 8.1 HIGH In Spring for Apache Pulsar, overly broad trusted-package matching in header mapper expose
CVE-2026-41729 8.1 HIGH Spring Data REST SpEL Injection via Map Key in JSON Patch
CVE-2026-41855 8.1 HIGH Spring Framework Unsafe Deserialization via Jackson JMS Converters
CVE-2026-41717 8.1 HIGH Spring Data MongoDB - SpEL Expression Injection via Annotated Query Parameter Binding
CVE-2026-41003 7.6 HIGH Unencoded HTML Outputs in Spring Security May Allow Cross-Site Scripting
CVE-2026-41728 7.5 HIGH Spring Data REST JSON Patch bypasses Jackson read-only property protection on nested objec
CVE-2026-41842 7.5 HIGH Spring Framework Denial of Service via Versioned Resources in Spring MVC and WebFlux
CVE-2026-41850 7.5 HIGH Spring Framework Algorithmic Denial of Service via SpEL Expressions
CVE-2026-41007 7.5 HIGH Spring HATEOAS heap exhaustion through unbounded internal caching
CVE-2026-41849 7.5 HIGH Spring Framework Denial of Service via Integer Overflow in SpEL Expressions
CVE-2026-40984 7.5 HIGH Micrometer HTTP server instrumentations DoS vulnerability
CVE-2026-41695 7.5 HIGH Denial of Service in Spring Data Commons Property Path Resolution
CVE-2026-41716 7.5 HIGH Spring Data web support unbounded negative-result cache keyed on attacker-supplied propert
CVE-2026-40988 7.5 HIGH Unbounded DEFLATE Inflation in SAML 2.0 Service Provider
CVE-2026-40983 7.5 HIGH Micrometer gRPC server instrumentation DoS vulnerability
CVE-2026-41006 7.5 HIGH Spring HATEOAS Collection+JSON/UBER deserializers do not honor Jackson configuration
CVE-2026-41720 7.4 HIGH Authentication Bypass with Empty Password in Spring LDAP
CVE-2026-40993 7.3 HIGH Unfiltered Java Native Deserialization of SAML 2.0 Asserting Party Credentials BLOB Databa
CVE-2026-41845 7.1 HIGH Spring Framework Cross-site Scripting via JavaScriptUtils

Showing top 20 of 51 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Reactor Netty
Same vendor: Spring
Same weakness: CWE-522

V. Comments for CVE-2026-41715

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