CyberSecBulletin
CVE-2026-50010NVD status: Modified

netty: Improper Verification of Cryptographic Signature

Published Updated By the CyberSecBulletin desk

CVE-2026-50010 is a high-severity improper verification of cryptographic signature vulnerability in netty, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected netty versions: >= 4.2.0.Final, < 4.2.15.Final; < 4.1.135.Final. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.49% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of netty you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on github.com for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
Nettynetty>= 4.2.0.Final, < 4.2.15.Final; < 4.1.135.FinalNot stated
Red HatCryostat 4 on RHEL 9Not specified in the recordNot stated
Red HatRed Hat AMQ Broker 7.13.6Not specified in the recordNot stated
Red HatRed Hat AMQ Broker 7.14.1Not specified in the recordNot stated
Red HatRed Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1Not specified in the recordNot stated
Red HatRed Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16Not specified in the recordNot stated
Red HatRed Hat build of Quarkus 3.27.4.SP1Not specified in the recordNot stated
Red HatRed Hat build of Quarkus 3.33.2.SP1Not specified in the recordNot stated
Red HatRed Hat Data Grid 8.6.2Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 8.1Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 8.1.7.GANot specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Not specified in the recordNot stated
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Not specified in the recordNot stated
Red HatStreams for Apache Kafka 2.9.4Not specified in the recordNot stated
Red HatRed Hat Offline Knowledge Portal 1.2.12Not specified in the recordNot stated
Red HatRed Hat OpenShift AI 2.25Not specified in the recordNot stated
Red HatRed Hat OpenShift Dev Spaces 3.30Not specified in the recordNot stated
Red HatOpenShift ServerlessNot specified in the recordNot stated
Red HatRed Hat AMQ ClientsNot specified in the recordNot stated
Red HatRed Hat build of Apache Camel 4 for Quarkus 3Not specified in the recordNot stated
Red HatRed Hat build of Apache Camel - HawtIO 4Not specified in the recordNot stated

Version data comes from the organisation that assigned the CVE; 11 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
NoneNothing can be modified.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by CNA (github.com).

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighCNA (github.com)
CVSS 3.17.5HighCNA

Official description

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, SimpleTrustManagerFactory.engineGetTrustManagers() and related paths wrap any user-supplied plain X509TrustManager in X509TrustManagerWrapper, which extends X509ExtendedTrustManager but implements the 3-arg checkServerTrusted(chain, authType, SSLEngine) by discarding the SSLEngine and calling the 2-arg delegate. Because the object now IS an X509ExtendedTrustManager, neither SunJSSE's internal AbstractTrustManagerWrapper nor Netty's own OpenSslX509TrustManagerWrapper will re-wrap it to add endpoint-identification. Consequently, even though Netty 4.2 sets endpointIdentificationAlgorithm="HTTPS" by default, a client built with `SslContextBuilder.forClient().trustManager(somePlainX509TrustManager)` performs no hostname verification at all. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in netty

All netty vulnerabilities

Recent Improper Verification of Cryptographic Signature vulnerabilities

Spotted an error? Tell us.