Is CVE-2026-103405 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-103405?

CVE-2026-103405 has a CVSS v3 severity of MEDIUM (5.8).

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CVE-2026-103405

Description

An Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in the web server in Juniper Networks Session Smart Router and Session Smart Conductor allows an attacker to inject arbitrary HTTP headers via unsanitized request body parameters.