5.3

CVE-2026-47874: pivotal reactor_netty

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

Vulnerability summary

CVE-2026-47874 is a medium (CVSS 5.3) vulnerability in pivotal reactor_netty. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33% 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
0.40%
0%100%
Low · +0.16 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

The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory. 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

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

+0.16 pp

From 0.24% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.40%

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

Pivotal1 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