CVE-2025-22227: Vulnerability in VMware Reactor Netty
Affects VMware Reactor NettySource CVE Database V5
Not known to be exploited · CVSS 6.1 Medium.
Data as of 10/25/2026, 04:40:09 UTC
- Exploitation
Not in CISA KEV, no exploitation reported
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NWhat to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| VMwareReactor Netty | Affected
| Fixed in
|
Mavenio.projectreactor/reactor-nettypkg:maven/io.projectreactor/reactor-nettyOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until a fix is available, avoid configuring the Reactor Netty HTTP client to follow redirects if possible, or carefully control and validate redirect targets to minimize credential exposure risk.
Description
In some specific scenarios with chained redirects, Reactor Netty HTTP client leaks credentials. In order for this to happen, the HTTP client must have been explicitly configured to follow redirects.
Impact
An attacker could potentially obtain leaked credentials during chained HTTP redirects if the client is configured to follow redirects. This leads to a confidentiality breach with limited impact on integrity and no impact on availability. No active exploitation has been reported.
Weaknesses
- CWE-200Exposure of Sensitive Information to an Unauthorized Actor (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #20OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.