CVE-2026-101936 Junos OS: SRX Series: An attacker causes data-plane denial of service when chassis-cluster high availability is enabled
An adjacent attacker can cause data-plane denial of service on Juniper SRX devices by sending malformed traffic when chassis-cluster HA is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101936?
CVE-2026-101936 is a high-severity denial of service vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Reachable Assertion vulnerability in the srxpfe process of Juniper Networks Junos OS on SRX Series allows an adjacent network attacker to cause a denial of service of the data plane via malformed firewall-authentication synchronization traffic on chassis-cluster fabric interfaces.
Weakness: CWE-617
Which versions are affected by CVE-2026-101936?
How do I fix CVE-2026-101936?
No fix has been published for CVE-2026-101936 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-2026-101936 being exploited?
There is no known exploitation of CVE-2026-101936 in the wild and no public exploit code.
Sources
Also known as GHSA-cwf7-v3fr-vjh3.