CVE-2026-32284
CVE-2026-32284 is a high-severity vulnerability in Shamaton Msgpack with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-16343
- Weakness: CWE-125
- Affected product: Shamaton Msgpack
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-32284?
- 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.
- How severe is CVE-2026-32284?
- CVE-2026-32284 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-32284 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-32284?
- CVE-2026-32284 affects Shamaton Msgpack. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-32284?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-32284 have an EU (EUVD) identifier?
- Yes. CVE-2026-32284 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16343.
- When was CVE-2026-32284 published?
- CVE-2026-32284 was published on 2026-03-26 and last updated on 2026-06-17.
References
- https://github.com/golang/vulndb/issues/4513
- https://github.com/shamaton/msgpack/issues/59
- https://pkg.go.dev/vuln/GO-2026-4513
- https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026
Affected products (1)
- cpe:2.3:a:shamaton:msgpack:*:*:*:*:*:go:*:*
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