CVE-2026-102072 Junos OS: An authenticated attacker causes a denial of service when the gRPC extension-service is enabled
An authenticated attacker can cause a denial of service in Junos OS via compressed gRPC requests when the extension-service is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102072?
CVE-2026-102072 is a high-severity denial of service vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An Improper Handling of Highly Compressed Data vulnerability in the gRPC library used by na-grpcd of Juniper Networks Junos OS allows an authenticated network-based attacker to cause a denial of service via a compressed gRPC request.
Weakness: CWE-409
Which versions are affected by CVE-2026-102072?
How do I fix CVE-2026-102072?
No fix has been published for CVE-2026-102072 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-2026-102072 being exploited?
There is no known exploitation of CVE-2026-102072 in the wild and no public exploit code.
Sources
Also known as GHSA-734c-f3j9-8vw8.