7.5

CVE-2026-48748: netty

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2026-48748DEBIAN-CVE-2026-48748CGA-7jrr-f23r-xh74
Published 12-06-2026Last modified 04-08-2026
Open JSON

Vulnerability summary

CVE-2026-48748 is a high (CVSS 7.5) vulnerability in netty. EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 51.7% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.68%
0%100%
Low · +0.29 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-4MCM-JHPP-Q2J2

Timeline

  1. 12-06-2026
    PublishedVulnerability first disclosed.
  2. 04-08-2026
    Last modifiedVulnerability information updated.

Description

Netty is a network application framework for development of protocol servers and clients. Starting in version 4.2.0.Final and prior to version 4.2.15.Final, a memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error. Version 4.2.15.Final patches the issue.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.68%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

+0.29 pp

From 0.39% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.68%

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

Chainguard3 products
  • apache-hop< 2.18.0-r6
  • celeborn-0.7< 0.7.0-r2
  • spark-4.1-scala-2.13< 4.1.2-r4
Debian1 product
  • nettyAll versions (No fix recorded)
Io.netty1 product
  • netty-codec-http3≥ 4.2.0.Final, < 4.2.15.Final
Netty1 product
  • netty≥ 4.2.0.Final, < 4.2.15.Final | ≥ 4.2.0, < 4.2.15
Ubuntu1 product
  • nettyAll versions (No fix recorded)
Wolfi1 product
  • spark-4.1-scala-2.13< 4.1.2-r4

6 vendors · 8 products

References

12 links
Show all 12 references