7.5

CVE-2026-32284: Denial of service in github.com/shamaton/msgpack

Analyzed
AliasesCGA-588w-g9jg-q33gCGA-7c5q-6732-gw8pGHSA-h9q6-hc68-35rp
Published 26-03-2026Last modified 07-10-2026

Vulnerability summary

CVE-2026-32284 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in github.com/shamaton/msgpack/v2. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 36.4% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (reference, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.42%
0%100%
Low · -0.27 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 2 · Related 3
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:1135-1CGA-XWFM-7HVM-P6PW

Timeline

  1. 26-03-2026
    PublishedVulnerability first disclosed.
  2. 07-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

Decrease -0.27 pp

From 0.69% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (securityinfinity.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Github.com/shamaton/msgpack2 products
  • v2≤ 2.4.0 | < 2.4.1 | All versions (No fix recorded)
  • v3≤ 3.1.0 | < 3.1.1 | All versions (No fix recorded)
Chainguard1 product
  • flyte< 1.16.7-r0
Github.com/shamaton1 product
  • msgpackAll versions (No fix recorded)
Github.com/shamaton/msgpack/v21 product
Github.com/shamaton/msgpack/v31 product
Shamaton1 product
Wolfi1 product
  • flyte< 1.16.7-r0

7 vendors · 8 products

References

9 links