GHSA-8f34-f56x-9xph

Source

https://github.com/advisories/GHSA-8f34-f56x-9xph

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-8f34-f56x-9xph/GHSA-8f34-f56x-9xph.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-8f34-f56x-9xph

Aliases

CVE-2026-107302

Published

2026-10-08T17:40:10Z

Modified

2026-10-08T18:00:09Z

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

Impact

A truncated map32 header causes an out-of-bounds buffer read and throws RangeError instead of IncompleteBufferError. Applications that rely on IncompleteBufferError to wait for additional bytes may terminate a request, stream, or worker unexpectedly. No adjacent memory is disclosed because the buffer implementation checks bounds.

Patches

The decoder now validates the complete five-byte map32 header before reading its length and reports truncated input as IncompleteBufferError.

Workarounds

Require at least five bytes before decoding a value beginning with 0xdf, or catch RangeError and treat it as incomplete input only for truncated map32 headers.

Database specific

{
    "cwe_ids": [
        "CWE-125"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-08T17:40:10Z",
    "nvd_published_at": null,
    "severity": "HIGH"
}

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-8f34-f56x-9xph/GHSA-8f34-f56x-9xph.json"