CVE-2026-56818 - Vulnerability Details - OpenCVE

A flaw was found in the Netty `netty-codec-redis` component. This vulnerability allows a remote attacker to cause a denial of service (DoS) by sending specially crafted Redis protocol frames over long-lived connections. The Redis decoder fails to properly release allocated memory, leading to memory exhaustion and application instability.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

No data.

No data.

No data.

No data.

References

Link	Providers
https://nvd.nist.gov/vuln/detail/CVE-2026-56818
https://www.cve.org/CVERecord?id=CVE-2026-56818

History

Tue, 28 Jul 2026 00:15:00 +0000

Type	Values Removed	Values Added
Description		A flaw was found in the Netty `netty-codec-redis` component. This vulnerability allows a remote attacker to cause a denial of service (DoS) by sending specially crafted Redis protocol frames over long-lived connections. The Redis decoder fails to properly release allocated memory, leading to memory exhaustion and application instability.
Title		io.netty/netty-codec-redis: Netty: Memory leak in netty-codec-redis
Weaknesses		CWE-772
References		https://nvd.nist.gov/vuln/detail/CVE-2026-56818 https://www.cve.org/CVERecord?id=CVE-2026-56818
Metrics	threat_severity `None`	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'}` threat_severity `Important`

MITRE

No data.

Vulnrichment

No data.

NVD

No data.

Redhat

Severity : Important

Publid Date: 2026-07-09T00:00:00Z

Links: CVE-2026-56818 - Bugzilla

OpenCVE Enrichment

No data.

{"bugzilla": {"description": "io.netty/netty-codec-redis: Netty: Memory leak in netty-codec-redis", "id": "2507476", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507476"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Netty `netty-codec-redis` component. This vulnerability allows a remote attacker to cause a denial of service (DoS) by sending specially crafted Redis protocol frames over long-lived connections. The Redis decoder fails to properly release allocated memory, leading to memory exhaustion and application instability."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-56818", "package_state": [{"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "netty-codec-redis", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:jboss_data_grid:8", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "netty-codec-redis", "product_name": "Red Hat Data Grid 8"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Out of support scope", "impact": "moderate", "package_name": "eap74-els-openjdk11-openshift-rhel8/eap74-els-openjdk11-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Out of support scope", "impact": "moderate", "package_name": "eap74-els-openjdk17-openshift-rhel8/eap74-els-openjdk17-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Out of support scope", "impact": "moderate", "package_name": "eap74-els-openjdk8-openshift-rhel8/eap74-els-openjdk8-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Out of support scope", "impact": "moderate", "package_name": "jboss-eap-7-eap74-els-openjdk17-openshift-rhel8/jboss-eap-7-eap74-els-openjdk17-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Out of support scope", "impact": "moderate", "package_name": "jboss-eap-7-eap74-els-openjdk8-openshift-rhel8/jboss-eap-7-eap74-els-openjdk8-openshift-rhel8", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Out of support scope", "impact": "moderate", "package_name": "netty-codec-redis", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "netty-codec-redis", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Out of support scope", "impact": "moderate", "package_name": "netty-codec-redis", "product_name": "Red Hat Single Sign-On 7"}], "public_date": "2026-07-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56818\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56818"], "statement": "This vulnerability is rated as Important because a remote attacker can cause a denial of service in applications utilizing `netty-codec-redis` by sending specially crafted Redis protocol frames. The memory leak in long-lived Redis connections can lead to JVM heap exhaustion, making the service unavailable.", "threat_severity": "Important"}