High severity · published Sep 11, 2026
CVE-2026-89146
libp2p-rendezvous through 0.17.1 Denial of Service via Unbounded Registration TTL in Discovery Responses
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
libp2p-rendezvous through 0.17.1 fails to validate registration TTL values in discovery responses, allowing attackers to trigger timer arithmetic overflow. A malicious rendezvous server can send a discovery response with an unbounded TTL value that causes the client node process to panic when computing the expiry timer.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libp2p-rendezvous · libp2p
through 0.17.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89146
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89146
docs.rs
https://docs.rs/crate/libp2p-rendezvous/0.17.1/source/src/client.rs
gist.github.com
https://gist.github.com/thesmartshadow/25ef03f7ebbd12118a9d27695c885989
github.com
https://github.com/libp2p/rust-libp2p
www.vulncheck.com
https://www.vulncheck.com/advisories/libp2p-rendezvous-through-0.17.1-denial-of-service-via-unbounded-registration-ttl-in-discovery-responses