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Fencer Intel
medium 6.1

CVE-2025-22227 json

CVE-2025-22227: Authentication Leak On Redirect With Reactor Netty HTTP Client

published last yr. modified last mo. also GHSA-4q2v-9p7v-3v22 , EUVD-2025-21595

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven io.projectreactor.netty:reactor-netty-http 1.2.8, 1.3.0-M5
  • VMware Reactor Netty 1.0.49 (Reactor BOM 2020.0.48), 1.1.32 (Reactor BOM 2022.0.27 and 2023.0.20), 1.2.8 (Reactor BOM 2024.0.8), 1.3.0-M5 (Reactor BOM 2025.0.0-M5)

Is CVE-2025-22227 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-22227 updated cvss 6.1

io.projectreactor.netty/reactor-netty: Reactor Netty Credential Leak via Redirects

  • Red Hat build of Apache Camel for Spring Boot 4 reactor-netty Red Hat Fuse 7 reactor-netty Red Hat JBoss Enterprise Application Platform 7 reactor-netty Red Hat JBoss Enterprise Application Platform 8 reactor-netty Red Hat JBoss Enterprise Application Platform Expansion Pack reactor-netty
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven io.projectreactor.netty:reactor-netty-http
>=1.3.0-M1, <1.3.0-M5
<1.2.8
1.3.0-M5
1.2.8

Affected products

  • VMware Reactor Netty

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.