CVE-2026-89146 libp2p-rendezvous through 0.17.1 Denial of Service via Unbounded Registration TTL in Discovery Responses
A malicious rendezvous server can cause a client node to panic via unbounded TTL values in discovery responses, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-89146?
CVE-2026-89146 is a high-severity vulnerability in libp2p-rendezvous, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-89146?
How do I fix CVE-2026-89146?
No fix has been published for CVE-2026-89146 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-89146 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89146 exists.
Sources
Also known as GHSA-gh9c-4324-26cm.