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High 7.5Published Mar 26, 2026
CVE-2026-32284The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8).
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
shamaton msgpack shamaton:msgpack | through 3.1.2 | NVD |
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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.