CVE-2026-107297

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-107297
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107297.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-107297
Aliases
Published
2026-10-08T17:07:03Z
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: Quadratic parsing in the streaming decoder
Details

msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the streaming decoder reparses an incomplete array or map from the beginning whenever another chunk arrives. A remote peer can split one valid MessagePack container across many small chunks, causing completed elements to be decoded repeatedly, producing quadratic CPU use and blocking the event loop. This issue is fixed in version 6.1.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107297.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-2026-107297.json"