CVE-2026-107299

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Source
https://cve.org/CVERecord?id=CVE-2026-107299
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107299.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-107299
Aliases
Published
2026-10-08T17:09:47Z
Modified
2026-10-09T02:49:21Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
msgpack5: Reserved byte can cause unbounded stream buffering
Details

msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the streaming decoder treats the reserved MessagePack byte 0xc1 as incomplete input instead of invalid input. When 0xc1 begins a stream, subsequent data remains buffered while the decoder waits for bytes that cannot make the value valid, allowing a remote peer to exhaust memory. This issue is fixed in version 6.1.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-228"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107299.json"
}
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
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "6.1.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

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-2026-107299.json"