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High, CVSS 8.6

Insufficiently Protected Credentials in Pivotal Reactor Netty

CVE-2019-11284GHSA-j52r-xc68-q8f4

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (io.projectreactor.netty:reactor-netty 0.8.11), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
8.6 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS
  • CVE-2019-11284: 0.90% estimated exploitation activity in the next 30 days; percentile 59.76 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Pivotal Reactor Netty, versions prior to 0.8.11, passes headers through redirects, including authorization ones. A remote unauthenticated malicious user may gain access to credentials for a different server than they have access to.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-j52r-xc68-q8f4

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2019-11284

Advisory: Insufficiently Protected Credentials in Pivotal Reactor Netty
IDs: CVE-2019-11284, GHSA-j52r-xc68-q8f4
Record: https://patchnext.com/advisories/cve-2019-11284 (revision 1, source checked 26 Oct 2026, 16:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: io.projectreactor.netty:reactor-netty 0.8.11. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven io.projectreactor.netty:reactor-netty: affected < 0.8.11; fixed in 0.8.11

## Suggested inspection (read-only)
- Maven io.projectreactor.netty:reactor-netty: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on io.projectreactor.netty:reactor-netty.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-j52r-xc68-q8f4 (GitHub-reviewed advisory GHSA-j52r-xc68-q8f4 lists affected ranges: Maven io.projectreactor.netty:reactor-netty >=0 <0.8.11)

Commands are suggestions: review each one before running it.

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