7.5

CVE-2026-44892: netty Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-44892DEBIAN-CVE-2026-44892CGA-2p62-hp6j-8xcf
Published 12-06-2026Last modified 12-06-2026
Open JSON

Vulnerability summary

CVE-2026-44892 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in netty. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 40.9% 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
0.49%
0%100%
Low · +0.21 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-669Q-XGHX-M5FF

Timeline

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

Description

Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, the default configuration of the `Http3ConnectionHandler` in the Netty HTTP/3 codec lacks an enforced maximum header size limit. When a peer does not explicitly specify `HTTP3_SETTINGS_MAX_FIELD_SECTION_SIZE`, the implementation defaults to an unbounded limit. This insecure default configuration allows a malicious client or server to send an enormous number of headers, leading to a memory exhaustion Denial of Service via an `OutOfMemoryError`. Version 4.2.15.Final contains a patch.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

+0.21 pp

From 0.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.49%

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

Chainguard30 products
  • apache-hop< 2.18.0-r6
  • apache-hop-fips< 2.18.0-r4
  • camunda-8.9< 8.9.6-r1
  • camunda-zeebe-8.9< 8.9.6-r1
  • celeborn-0.7< 0.7.0-r2
Wolfi21 products
  • opensearch-3< 3.6.0-r7
  • opensearch-3-discovery-ec2< 3.8.0-r3
  • opensearch-3-iamguarded-compat< 3.8.0-r3
  • opensearch-3-neural-searchAll versions (No fix recorded)
  • opensearch-3-repository-azure< 3.6.0-r7
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)

6 vendors · 55 products

References

8 links