CVE-2026-101937 Junos OS: SRX Series: An attacker causes data-plane denial of service when chassis-cluster high availability is used
An adjacent attacker can cause data-plane denial of service on Juniper SRX devices using chassis-cluster high availability due to a signed-to-unsigned conversion error.
- 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-2026-101937?
CVE-2026-101937 is a high-severity 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 Signed to Unsigned Conversion Error vulnerability in the srxpfe of Juniper Networks Junos OS on the SRX Series allows an adjacent attacker to cause a denial of service of the data plane via chassis-cluster fabric traffic.
Weakness: CWE-195
Which versions are affected by CVE-2026-101937?
How do I fix CVE-2026-101937?
No fix has been published for CVE-2026-101937 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101937 being exploited?
There is no known exploitation of CVE-2026-101937 in the wild and no public exploit code.
Sources
Also known as GHSA-4w4g-6ffw-r3vg.