msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, decoding a negative signed 64-bit integer modifies the corresponding bytes in the caller-provided input buffer while computing the value. Applications that…
Exact source revision recorded 1 Nov 2026 02:10:14 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-95107
Publishedmsgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, decoding a negative signed 64-bit integer modifies the corresponding bytes in the caller-provided input buffer while computing the value. Applications that retain or reuse encoded input for integrity checks, logging, or later processing can observe silently corrupted data, while positive integers and other MessagePack value types are unaffected. This issue is fixed in version 6.1.0.
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Oct 8, 2026, 5:05:34 PM
dateUpdated: Oct 14, 2026, 1:01:55 AM
1 related source bulletins · separate from aliases
msrc_CVE-2026-107296: msgpack5: Decoding negative int64 values mutates the input buffer
CVE-2026-107296
- Source published
- Oct 8, 2026, 5:05:34 PM (timezone not stated)
- Source modified
- Oct 14, 2026, 1:01:55 AM (timezone not stated)
- Observed here
- 1 Nov 2026 02:10:14 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.
EUVD CVSS 3.1 · 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N