GHSA-qw35-55vc-rhgj

Source

https://github.com/advisories/GHSA-qw35-55vc-rhgj

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-qw35-55vc-rhgj/GHSA-qw35-55vc-rhgj.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-qw35-55vc-rhgj

Aliases

CVE-2026-107296

Published

2026-10-08T17:39:30Z

Modified

2026-10-08T17:45:03Z

Severity

3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator

Summary

msgpack5: Decoding negative int64 values mutates the input buffer

Details

Impact

Decoding a negative signed 64-bit integer modifies the corresponding bytes in the caller-provided input buffer. Applications that retain or reuse encoded input for integrity checks, logging, or subsequent processing may observe silently corrupted data.

Positive integers and other MessagePack value types are not affected.

Patches

The decoder now computes signed 64-bit values without writing to the input buffer.

Workarounds

Copy untrusted MessagePack input before decoding it, or do not retain or reuse input buffers after decoding.

Database specific

{
    "cwe_ids": [
        "CWE-471"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-08T17:39:30Z",
    "nvd_published_at": null,
    "severity": "LOW"
}

References

Affected packages

npm / msgpack5

Package

Name: msgpack5; View open source insights on deps.dev
Purl: pkg:npm/msgpack5

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

6.1.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-qw35-55vc-rhgj/GHSA-qw35-55vc-rhgj.json"