CVE-2026-86040 libp2p - Denial of Service

libp2p prior to 11.0.26 contains a denial of service caused by unauthenticated RPC frames with excessive subscription entries in floodsub, letting remote peers exhaust CPU and memory, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.67% 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
17 September 2026
Updated
15 October 2026
Weakness
CWE-400

Vendor fix

Update to version 11.0.26 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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