Answer in brief
CVE-2026-32284 records a High severity (CVSS 7.5) vulnerability in Denial of service in github.com/shamaton/msgpack. The current sources do not mark it as known exploited. The current feed maps github.com/shamaton/msgpack/v2 (go), github.com/shamaton/msgpack/v3 (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps github.com/shamaton/msgpack/v2 (go), github.com/shamaton/msgpack/v3 (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| github.com/shamaton/msgpack/v2go | >=0 | Not reported |
| github.com/shamaton/msgpack/v3go | >=0 | Not reported |
Published upstream
Mar 18, 2026
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Sep 10, 2026
The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.
Quoted source text, attributed separately from HOL analysis.