7.5

CVE-2026-73507: netty Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-73507DEBIAN-CVE-2026-73507CGA-5h2c-f9wh-q26v
Published 13-08-2026Last modified 15-08-2026
Open JSON

Vulnerability summary

CVE-2026-73507 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in netty. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 55.5% 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
0.79%
0%100%
Low · +0.34 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-4CC8-R6C6-W5XH

Timeline

  1. 13-08-2026
    PublishedVulnerability first disclosed.
  2. 15-08-2026
    Last modifiedVulnerability information updated.

Description

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.xml.XmlFrameDecoder.decode() failed to preserve closing-tag parser state across invocations, so an unauthenticated remote attacker could trickle-feed repeated </ sequences that repeatedly rescanned the accumulated buffer and exhausted an EventLoop thread's CPU, causing denial of service with a maxFrameLength of 1 MB. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.79%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.34 pp

From 0.46% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.79%

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

Chainguard12 products
  • apache-hop< 2.18.1-r8
  • apache-hop-fips< 2.18.1-r6
  • gremlin-server< 3.8.1-r2
  • hadoop-fips-3.3.6All versions (No fix recorded)
  • hadoop-fips-3.4.2All versions (No fix recorded)
Wolfi4 products
  • management-api-for-apache-cassandra-5.0< 0.1.122-r2
  • tez< 0.10.5-r23
  • thingsboard-tb-mqtt-transport< 4.3.1.3-r7
  • thingsboard-tb-node< 4.3.1.3-r7
Debian1 product
  • nettyAll versions (No fix recorded)
Io.netty1 product
  • netty-codec-xml≥ 4.2.0.Final, < 4.2.16.Final | < 4.1.136.Final
Netty1 product
  • netty< 4.1.136.Final | ≥ 4.2.0.Final, < 4.2.16.Final | < 4.1.136 | ≥ 4.2.0, < 4.2.16
Ubuntu1 product
  • nettyAll versions (No fix recorded)

6 vendors · 20 products

References

13 links
Show all 13 references