CVE-2026-57054 Details
Description
A Use of Incorrectly-Resolved Name or Reference vulnerability in the URL filtering plugin of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to bypass web filtering and access downstream resources that should be unreachable. If an MX Series device is configured with web filtering, and an attacker sends a request with a specifically formatted URL, this request will get forwarded despite the system being configured to block it. In turn, an attacker can access downstream resources that are expected to be unreachable. This issue affects Junos OS on MX Series: * 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, * 25.4 versions before 25.4R1-S2, 25.4R2.
A vulnerability allowing web filtering bypass has been identified in Juniper Networks Junos OS on MX Series devices. This issue arises in the URL filtering plugin, where an unauthenticated, network-based attacker can send requests with specially formatted URLs that bypass configured web filters. As a result, attackers can access downstream resources that should be blocked. The vulnerability affects all Junos OS versions on MX Series prior to 23.2R2-S7, 23.4R2-S8, 24.2R2-S5, 24.4R2-S4, 25.2R2-S1, 25.4R1-S2, 25.4R2, and 26.2R1.
Users can upgrade to Junos OS versions 23.2R2-S7, 23.4R2-S8, 24.2R2-S5, 24.4R2-S4, 25.2R2-S1, 25.4R1-S2, 25.4R2, 26.2R1, or any subsequent release. Instructions for upgrading can be found on the Juniper Networks Customer Support website.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://supportportal.juniper.net/JSA110093 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-706 | Use of Incorrectly-Resolved Name or Reference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| juniper junos | < 23.2 23.2 - 23.2 r1 23.2 r1-s1 23.2 r1-s2 23.2 r2 23.2 r2-s1 23.2 r2-s2 23.2 r2-s3 23.2 r2-s4 23.2 r2-s5 23.2 r2-s6 23.4 - 23.4 r1 23.4 r1-s1 23.4 r1-s2 23.4 r2 23.4 r2-s1 23.4 r2-s2 23.4 r2-s3 23.4 r2-s4 23.4 r2-s5 23.4 r2-s6 23.4 r2-s7 24.2 - 24.2 r1 24.2 r1-s1 24.2 r1-s2 24.2 r2 24.2 r2-s1 24.2 r2-s2 24.2 r2-s3 24.2 r2-s4 24.4 - 24.4 r1 24.4 r1-s2 24.4 r1-s3 24.4 r2 24.4 r2-s1 24.4 r2-s2 24.4 r2-s3 25.2 - 25.2 r1 25.2 r1-s1 25.2 r1-s2 25.2 r2 25.4 - 25.4 r1 25.4 r1-s1 |
CPE
Remediation
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| juniper mx10004 | All versions |
CPE
Remediation
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| juniper mx10008 | All versions |
CPE
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| juniper mx2008 | All versions |
CPE
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| juniper mx2010 | All versions |
CPE
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| juniper mx2020 | All versions |
CPE
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| juniper mx204 | All versions |
CPE
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| juniper mx240 | All versions |
CPE
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| juniper mx301 | All versions |
CPE
Remediation
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| juniper mx304 | All versions |
CPE
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| juniper mx480 | All versions |
CPE
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| juniper mx960 | All versions |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 13, 2026 | Initial Analysis | [email protected] |
| Jul 10, 2026 | CVE Modified | CISA-ADP |
| Jul 9, 2026 | New CVE Received | [email protected] |