CVE-2026-107302 msgpack5 - Denial of Service

msgpack5 prior to 6.1.0 contains a denial of service caused by improper validation of truncated map32 headers in the decoder, letting attackers cause unexpected termination of requests or streams, exploit requires crafted input.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.43% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
8 October 2026
Updated
15 October 2026
Weakness
CWE-125

Vendor fix

Update to version 6.1.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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