5.3

CVE-2026-47845: broadcom reactor_netty Authentication Bypass by Spoofing

CVSS: 5.3v3.1MediumAnalyzed
Published 26-08-2026Last modified 27-08-2026
Open JSON

Vulnerability summary

CVE-2026-47845 is a medium (CVSS 5.3) Authentication Bypass by Spoofing vulnerability in broadcom reactor_netty. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.5% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.29%
0%100%
Low · +0.12 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-08-2026
    PublishedVulnerability first disclosed.
  2. 27-08-2026
    Last modifiedVulnerability information updated.

Description

In specific scenarios, Reactor Netty HTTP Server may incorrectly evaluate the remote IP address when HAProxy Protocol is enabled. In order for this to happen, the application must be configured to use HAProxy Protocol. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

+0.12 pp

From 0.18% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Broadcom1 product
  • reactor_netty< 1.0.53 | ≥ 1.1.0, < 1.2.19 | ≥ 1.3.0, < 1.3.6.1
Spring1 product
  • reactor netty≥ 1.3.0, ≤ 1.3.6 | ≥ 1.1.0, ≤ 1.2.18 | ≤ 1.0.52

2 vendors · 2 products

References

1 links