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TI-2026-36837 Aliases CVE-2026-50011GHSA-5w86-c3rq-vjj7

Netty has unbounded pre-allocation in RedisArrayAggregator from RESP array length

Priority LOW 39CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 4 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.

Summary

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, RedisArrayAggregator pre-allocates ArrayList with initial capacity equal to the RESP array element count declared in an array header. That count is taken from the wire before the corresponding child messages exist. A small malicious header can claim a huge initial capacity. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00461 40th percentileScored 2026-11-07
Fix Partial netty (netty): 4.2.15.Final, 4.1.135.Finalio.netty:netty-codec-redis (Maven): 4.2.15.Final, 4.1.135.FinalRed Hat: 6 advisoriesRed Hat: 4 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nettynetty4.2.0.Final to before 4.2.15.Final; before 4.1.135.Final4.2.15.Final, 4.1.135.FinalPatch availableCNA
—io.netty:netty-codec-redis (Maven)4.2.0.Final to before 4.2.15.Final4.2.15.FinalPatch availableGHSA-5w86-c3rq-vjj7
—io.netty:netty-codec-redis (Maven)before 4.1.135.Final4.1.135.FinalPatch availableGHSA-5w86-c3rq-vjj7
  • netty Vendornetty Affected 4.2.0.Final to before 4.2.15.Final; before 4.1.135.Final Fixed in 4.2.15.Final, 4.1.135.Final Patch available CNA
  • io.netty:netty-codec-redis (Maven) Vendor— Affected 4.2.0.Final to before 4.2.15.Final Fixed in 4.2.15.Final Patch available GHSA-5w86-c3rq-vjj7
  • io.netty:netty-codec-redis (Maven) Vendor— Affected before 4.1.135.Final Fixed in 4.1.135.Final Patch available GHSA-5w86-c3rq-vjj7

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*before 4.1.135; 4.2.0 to before 4.2.15Vulnerablenetty
  • cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:* Versions before 4.1.135; 4.2.0 to before 4.2.15 Vulnerable ·netty

Remediation

  • Fix · CNA netty (netty) Fixed in 4.2.15.Final, 4.1.135.Final
  • Fix · GHSA-5w86-c3rq-vjj7 io.netty:netty-codec-redis (Maven) Fixed in 4.2.15.Final Advisory →
  • Fix · GHSA-5w86-c3rq-vjj7 io.netty:netty-codec-redis (Maven) Fixed in 4.1.135.Final Advisory →

Red Hat 6 advisories

  • RHSA-2026:53806 Released 2026-08-11 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 7.4.25 security update
    • Red Hat JBoss Enterprise Application Platform 7.4.25
  • RHSA-2026:53646 Released 2026-08-11 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 7.4.25 Security update
    • Red Hat JBoss EAP 7.4 ELS for RHEL 9 eap7-activemq-artemis-2.16.0-22.redhat_00057.1.el9eap, eap7-activemq-artemis-cli-2.16.0-22.redhat_00057.1.el9eap, eap7-activemq-artemis-commons-2.16.0-22.redhat_00057.1.el9eap +47
  • RHSA-2026:53645 Released 2026-08-11 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 7.4.25 Security update
    • Red Hat JBoss EAP 7.4 ELS for RHEL 8 eap7-activemq-artemis-2.16.0-22.redhat_00057.1.el8eap, eap7-activemq-artemis-cli-2.16.0-22.redhat_00057.1.el8eap, eap7-activemq-artemis-commons-2.16.0-22.redhat_00057.1.el8eap +47
Show 3 more Red Hat advisories
  • RHSA-2026:53644 Released 2026-08-11 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 7.4.25 security pdate
    • Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server eap7-activemq-artemis-2.16.0-22.redhat_00057.1.el7eap, eap7-activemq-artemis-cli-2.16.0-22.redhat_00057.1.el7eap, eap7-activemq-artemis-commons-2.16.0-22.redhat_00057.1.el7eap +47
  • RHSA-2026:41951 Released 2026-07-20 · Red Hat rating Important
    Red Hat Data Grid 8.6.2 security update
    • Red Hat Data Grid 8.6.2
  • RHSA-2026:37390 Released 2026-07-09 · Red Hat rating Important
    Red Hat Build of Apache Camel 4.18.1.P1 for Spring Boot release.
    • Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Fuse 7AffectedNo fix planned: Will not fix
Red Hat Data Grid 8.6.2Fixed RHSA-2026:41951
Red Hat JBoss EAP 7.4 ELS for RHEL 7 ServerFixed RHSA-2026:53644
Red Hat JBoss Enterprise Application Platform 7.4.25Fixed RHSA-2026:53806
Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16Fixed RHSA-2026:37390
Not affected: 3 products
  • Red Hat JBoss Enterprise Application Platform 8
  • Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Single Sign-On 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-50011
  2. 2026-10-03 Alias added: GHSA-5w86-c3rq-vjj7
  3. 2026-10-10 Fix available: Red Hat JBoss Enterprise Application Platform 8.1 · Red Hat
  4. 2026-10-16 Affected versions changed · Red Hat
  5. 2026-10-21 Affected versions changed · Red Hat
  6. 2026-10-25 EPSS moved to the below the 50th percentile
  7. 2026-10-25 Priority changed: MEDIUM → LOW
  8. 2026-11-01 Affected versions changed · Red Hat

References

Advisory 2

Other 3

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2026-30861 Netty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling Sanitization CVSS 3.1CRITICAL 9.8
  • TI-2026-30864 Netty: HttpClientCodec response desynchronization CVSS 3.1CRITICAL 9.1
  • TI-2026-30859 Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder) CVSS 3.1CRITICAL 9.1
  • TI-2026-40973 Netty: Missing CertificateID Validation in OCSP Response Allows Replay Attacks CVSS 3.1CRITICAL 9.1
  • TI-2026-40972 Uncontrolled resource consumption in netty CVSS 3.1HIGH 7.5
See all 92 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences