CVE-2026-57054: CWE-706 Use of Incorrectly-Resolved Name or Reference in Juniper Networks Junos OS
CVE-2026-57054 is a vulnerability in the URL filtering plugin of Juniper Networks Junos OS on MX Series devices. It allows an unauthenticated, network-based attacker to bypass web filtering by sending a specially crafted URL, enabling access to downstream resources that should be blocked. This affects multiple versions of Junos OS on MX Series prior to specific fixed releases.
AI Analysis
Technical Summary
This vulnerability (CWE-706) in Juniper Networks Junos OS on MX Series involves the use of an incorrectly-resolved name or reference in the URL filtering plugin. When web filtering is enabled, an attacker can send a specially formatted URL that bypasses the filtering mechanism, causing the request to be forwarded despite blocking configurations. This results in unauthorized access to downstream resources that are intended to be unreachable. The issue affects all versions before 23.2R2-S7, 23.4 versions before 23.4R2-S8, 24.2 versions before 24.2R2-S5, 24.4 versions before 24.4R2-S4, 25.2 versions before 25.2R2-S1, and 25.4 versions before 25.4R1-S2 and 25.4R2.
Potential Impact
An unauthenticated attacker can bypass configured web filtering on Junos OS MX Series devices, potentially accessing internal or downstream network resources that should be blocked. The vulnerability does not impact confidentiality but allows integrity compromise by unauthorized access to restricted resources. Availability is not affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The affected versions are fixed in releases 23.2R2-S7, 23.4R2-S8, 24.2R2-S5, 24.4R2-S4, 25.2R2-S1, and 25.4R1-S2 / 25.4R2. Users should upgrade to these fixed versions once available. No vendor advisory content is provided here to confirm if temporary mitigations exist.
CVE-2026-57054: CWE-706 Use of Incorrectly-Resolved Name or Reference in Juniper Networks Junos OS
Description
CVE-2026-57054 is a vulnerability in the URL filtering plugin of Juniper Networks Junos OS on MX Series devices. It allows an unauthenticated, network-based attacker to bypass web filtering by sending a specially crafted URL, enabling access to downstream resources that should be blocked. This affects multiple versions of Junos OS on MX Series prior to specific fixed releases.
CVSS v3.1
Score 5.8medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-706) in Juniper Networks Junos OS on MX Series involves the use of an incorrectly-resolved name or reference in the URL filtering plugin. When web filtering is enabled, an attacker can send a specially formatted URL that bypasses the filtering mechanism, causing the request to be forwarded despite blocking configurations. This results in unauthorized access to downstream resources that are intended to be unreachable. The issue affects all versions before 23.2R2-S7, 23.4 versions before 23.4R2-S8, 24.2 versions before 24.2R2-S5, 24.4 versions before 24.4R2-S4, 25.2 versions before 25.2R2-S1, and 25.4 versions before 25.4R1-S2 and 25.4R2.
Potential Impact
An unauthenticated attacker can bypass configured web filtering on Junos OS MX Series devices, potentially accessing internal or downstream network resources that should be blocked. The vulnerability does not impact confidentiality but allows integrity compromise by unauthorized access to restricted resources. Availability is not affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The affected versions are fixed in releases 23.2R2-S7, 23.4R2-S8, 24.2R2-S5, 24.4R2-S4, 25.2R2-S1, and 25.4R1-S2 / 25.4R2. Users should upgrade to these fixed versions once available. No vendor advisory content is provided here to confirm if temporary mitigations exist.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-06-23T16:55:07.912Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a50171868715ace431ea232
Added to database: 07/09/2026, 21:48:08 UTC
Last enriched: 07/09/2026, 22:03:17 UTC
Last updated: 07/10/2026, 01:14:23 UTC
Views: 11
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