Unbounded multi-line response accumulation in SmtpResponseDecoder leads to memory-exhaustion DoS

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Fixes

Solution

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Workaround

See https://github.com/netty/netty/security/advisories/GHSA-pq4x-537v-r54q for fixed versions and remediation guidance.

History

Fri, 18 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Title Netty: netty-codec-smtp: io.netty/netty-codec-smtp: netty: unbounded multi-line response accumulation in smtpresponsedecoder leads to memory-exhaustion dos Io.netty/netty-codec-smtp: netty: unbounded multi-line response accumulation in smtpresponsedecoder leads to memory-exhaustion dos

Fri, 18 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Fri, 18 Sep 2026 11:00:00 +0000

Type Values Removed Values Added
Description Unbounded multi-line response accumulation in SmtpResponseDecoder leads to memory-exhaustion DoS
Title Netty: netty-codec-smtp: io.netty/netty-codec-smtp: netty: unbounded multi-line response accumulation in smtpresponsedecoder leads to memory-exhaustion dos
First Time appeared Redhat
Redhat camel Spring Boot
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat red Hat Single Sign On
Weaknesses CWE-1035
CPEs cpe:/a:redhat:camel_spring_boot:4
cpe:/a:redhat:jboss_enterprise_application_platform:7
cpe:/a:redhat:jboss_fuse:7
cpe:/a:redhat:red_hat_single_sign_on:7
Vendors & Products Redhat
Redhat camel Spring Boot
Redhat jboss Enterprise Application Platform
Redhat jboss Fuse
Redhat red Hat Single Sign On
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-18T13:32:22.314Z

Reserved: 2026-09-18T09:56:54.043Z

Link: CVE-2026-93563

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-18T11:17:21.773

Modified: 2026-09-18T11:17:21.773

Link: CVE-2026-93563

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses