CVE-2026-32284 - Vulnerability Details - OpenCVE

The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

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.

Key SSVC decision points have not yet been added.

Vendors	Products
Shamaton	Msgpack

No data.

No data.

References

Link	Providers
https://github.com/golang/vulndb/issues/4513
https://github.com/shamaton/msgpack/issues/59
https://nvd.nist.gov/vuln/detail/CVE-2026-32284
https://pkg.go.dev/vuln/GO-2026-4513
https://www.cve.org/CVERecord?id=CVE-2026-32284

History

Fri, 27 Mar 2026 12:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-805
References		https://nvd.nist.gov/vuln/detail/CVE-2026-32284 https://www.cve.org/CVERecord?id=CVE-2026-32284
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Fri, 27 Mar 2026 09:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-119

Fri, 27 Mar 2026 08:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Shamaton Shamaton msgpack
Vendors & Products		Shamaton Shamaton msgpack

Thu, 26 Mar 2026 20:00:00 +0000

Type	Values Removed	Values Added
Description		The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.
Title		Denial of service in github.com/shamaton/msgpack
References		https://github.com/golang/vulndb/issues/4513 https://github.com/shamaton/msgpack/issues/59 https://pkg.go.dev/vuln/GO-2026-4513

MITRE

Status: PUBLISHED

Assigner: Go

Published: 2026-03-26T19:40:51.686Z

Updated: 2026-03-26T19:40:51.686Z

Reserved: 2026-03-11T16:38:46.556Z

Link: CVE-2026-32284

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-03-26T20:16:12.087

Modified: 2026-03-26T20:16:12.087

Link: CVE-2026-32284

Redhat

Severity : Moderate

Publid Date: 2026-03-26T19:40:51Z

Links: CVE-2026-32284 - Bugzilla

{"bugzilla": {"description": "github.com/shamaton/msgpack: msgpack: Denial of Service via truncated fixext data", "id": "2451851", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451851"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-805", "details": ["A flaw was found in the msgpack decoder. A remote attacker could send specially crafted, truncated fixext data to an application using the msgpack library. This improper input validation can lead to an out-of-bounds read and a runtime panic, resulting in a denial of service (DoS) attack against the application."], "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-2026-32284", "package_state": [{"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/cluster-logging-operator-bundle", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/cluster-logging-rhel9-operator", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Fix deferred", "package_name": "openshift-logging/eventrouter-rhel9", 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"cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "satellite/iop-insights-engine-rhel9", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "satellite/iop-puptoo-rhel9", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "satellite/iop-vulnerability-engine-rhel9", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "satellite/iop-yuptoo-rhel9", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-03-26T19:40:51Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-32284\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-32284\nhttps://github.com/golang/vulndb/issues/4513\nhttps://github.com/shamaton/msgpack/issues/59\nhttps://pkg.go.dev/vuln/GO-2026-4513"], "threat_severity": "Moderate"}