CVE-2026-32284

Name: CVE-2026-32284
Creator: NVD / NIST
Published: 2026-03-26T20:16:12.087+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2026-32284 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.40%

32.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Shamaton	Msgpack	<= 3.1.2

References

https://github.com/golang/vulndb/issues/4513Issue Tracking, Third Party Advisory
https://github.com/shamaton/msgpack/issues/59Issue Tracking, Vendor Advisory
https://pkg.go.dev/vuln/GO-2026-4513Third Party Advisory
https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026Exploit, Third Party Advisory

Timeline

Published: Mar 26, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-32284?

How severe is CVE-2026-32284?

CVE-2026-32284 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2026-32284?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-32284?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST