CVE-2026-101942 Junos OS and Junos OS Evolved: An attacker causes rpd denial of service when EVPN route signaling is used
An unauthenticated attacker can cause a denial of service in Junos OS by sending malformed EVPN routes to a configured peer.
- 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-2026-101942?
CVE-2026-101942 is a high-severity denial of service vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) process of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause a denial of service via a malformed EVPN Type-3 or Type-4 route received from a configured EVPN peer and processed during re-advertisement.
Weakness: CWE-130
Which versions are affected by CVE-2026-101942?
How do I fix CVE-2026-101942?
No fix has been published for CVE-2026-101942 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-101942 being exploited?
There is no known exploitation of CVE-2026-101942 in the wild and no public exploit code.
Sources
Also known as GHSA-x6j5-6229-gfgq.