CVE-2026-107302

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Source
https://cve.org/CVERecord?id=CVE-2026-107302
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107302.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-107302
Aliases
Downstream
AZL (1)
CLSA (2)
Published
2026-10-08T17:14:19Z
Modified
2026-10-28T02:31:12Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
msgpack5: Truncated map32 headers throw an unexpected error
Details

msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the decoder reads the four-byte length of a map32 value before validating that the complete five-byte header is available. A truncated map32 header therefore causes a checked out-of-bounds buffer read and throws RangeError instead of IncompleteBufferError, which can unexpectedly terminate a request, stream, or worker in applications that wait for additional bytes after IncompleteBufferError. There is no adjacent-memory disclosure because the buffer implementation checks bounds. This issue is fixed in version 6.1.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-125"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107302.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "introduced":  ">= 4.1.0. < 6.1.0"
                        },
                        {
                            "last_affected":  ">= 4.1.0. < 6.1.0"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StandaloneSingleVersion"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/mcollina/msgpack5

Affected ranges

Type
GIT
Repo
https://github.com/mcollina/msgpack5
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3730a5a754ec06912e42865eed9489ed64238ecb
Fixed
15443a1f2aa682a6aa37f1705ac628de5b866ad1
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "6.1.0"
                }
            ],
            "source":  "DESCRIPTION"
        },
        {
            "range":  [
                {
                    "fixed":  "15443a1f2aa682a6aa37f1705ac628de5b866ad1"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v6.1.0",
            "range":  [
                {
                    "fixed":  "3730a5a754ec06912e42865eed9489ed64238ecb"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

v1.*
v1.2.0
v1.3.1
v1.3.2
v1.5.0
v1.6.0
v2.*
v2.0.0
v2.1.0
v2.2.0
v2.3.0
v2.3.1
v3.*
v3.0.0
v3.1.0
v3.2.0
v3.3.0
v3.4.0
v3.4.1
v3.5.0
v3.6.0
v3.6.1
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.1.0
v4.2.0
v4.3.0
v4.4.0
v5.*
v5.0.0
v5.1.0
v5.2.0
v5.2.1
v5.3.0
v5.3.1
v5.3.2
v6.*
v6.0.0
v6.0.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107302.json"