CVE-2026-102072: Junos OS: An authenticated attacker causes a denial of service when the gRPC extension-service is enabled

Published Oct 14, 2026

Updated

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.

Affected Software

1 affected component

Juniper Networks Junos OS

Remediation

Recommended actions to resolve this vulnerability, in priority order.

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Fixed in 23.2R2-S7.7-EVO
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Upgrade Juniper Junos OS Evolved to a version that resolves this vulnerability.
Fixed in 23.4R2-S8.11-EVO
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Upgrade Juniper Junos OS Evolved to a version that resolves this vulnerability.
Fixed in 24.2R2-S5.6-EVO
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Upgrade Juniper Junos OS Evolved to a version that resolves this vulnerability.
Fixed in 24.4R2-S5-EVO
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Upgrade Juniper Junos OS Evolved to a version that resolves this vulnerability.
Fixed in 25.2R2-S2-EVO
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Upgrade Juniper Junos OS Evolved to a version that resolves this vulnerability.
Fixed in 25.2X100-D35-EVO
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Upgrade Juniper Junos OS Evolved to a version that resolves this vulnerability.
Fixed in 25.4R1-S3-EVO
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Upgrade Juniper Junos OS Evolved to a version that resolves this vulnerability.
Fixed in 25.4R2-EVO
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Upgrade Juniper Junos OS Evolved to a version that resolves this vulnerability.
Fixed in 25.4X300-D40-EVO
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Fixed in 26.2R1-S2-EVO
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Upgrade Juniper Junos OS Evolved to a version that resolves this vulnerability.
Fixed in 26.2R2-EVO
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Fixed in 26.4R1-EVO
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Fixed in 23.2R2-S7.7
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Fixed in 23.4R2-S8.13
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Fixed in 24.2R2-S5.5
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Fixed in 24.4R2-S5
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Fixed in 25.2R2-S2
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Fixed in 25.4R1-S3
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Fixed in 25.4R2
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Fixed in 26.2R1-S2
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Upgrade Juniper Junos OS to a version that resolves this vulnerability.
Fixed in 26.2R2
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Upgrade Juniper Junos OS to a version that resolves this vulnerability.
Fixed in 26.4R1

Event History

Oct 14, 2026

CVE Published

via MITRE·04:16 PM

Data Sourced

via MITRE·04:16 PM

RemedyDescriptionSeverityWeakness

Frequently Asked Questions

Who is exposed to this issue?

Junos OS deployments with the gRPC extension-service enabled are exposed. Exploitation requires an authenticated network-based attacker.

What does an attacker need to do to trigger the vulnerability?

The attacker needs valid authentication and network access to send a compressed gRPC request to the affected service.

What is the likely impact of successful exploitation?

Successful exploitation can cause a denial of service. The supplied severity vector indicates no stated confidentiality or integrity impact.